Diets for Managing CKD in Cats

Posted on October 1, 2023 by felinepurrspective_u3q4o6

Diet is a key therapy for cats with chronic kidney disease (CKD). Diets for managing CKD in cats aim to (Reference 1):

lessen the clinical signs of CKD
slow the progression of the disease
provide adequate nutrition

Diets for managing ckd in cats

The goal of diets for managing CKD in cats is to reduce the amount of uremic waste products while providing adequate nutrition. There are a number of commercially available diets that are formulated to do this. These foods feature (Reference 1):

reduced phosphorus
restricted amounts of high-quality protein
higher calories
reduced sodium
potassium supplementation
B vitamins and fatty acids

Phosphorus

Phosphorus is needed for the growth, maintenance, and repair of all tissues and cells, and for the production of the genetic building blocks, DNA and RNA. Phosphorus is also needed to help balance and use other vitamins and minerals, including vitamin D, iodine, magnesium, and zinc (Reference 2).

As kidney disease progresses, the ability of the kidneys to excrete phosphorus declines. To reduce stress on the kidneys, diets for managing CKD in cats aim to reduce the amount of phosphorus and balance the ratio of calcium to phosphorus. Too much phosphorus and not enough calcium can lead to kidney and bone damage (Reference 1). Commercial kidney diets are formulated to maintain an appropriate ratio of calcium to phosphorus.

protein in diets for managing cats with ckd

Since protein contributes significantly to phosphorus content, kidney diets restrict the amount of protein. Less protein means less uremic waste products. Emphasis is placed on formulating these diets with “high quality” protein. High quality proteins are a “complete package” and provide the cat with all the amino acids he or she needs. Thus, the protein used is highly bioavailable and generates less uremic waste products (Reference 1).

There are concerns that reduced protein diets predispose cats to weight loss and loss of lean muscle mass. Some recent studies suggest that senior cats may require more protein than younger cats to maintain lean body mass (LBM) (Reference 1).

Some practitioners advocate feeding higher protein diets to cats suffering with CKD to maintain the LBM. This may not be the answer to maintain LBM – increased protein in the cat’s diet means more uremic waste, making the cat feel nauseated and not inclined to eat. Ultimately, the cat will be eating less and calorie reduction will lead to muscle wasting as the cat’s body uses his own muscles for nutrition (Reference 3).

More on Lean Body Mass…

A recent study in 2019 (Reference 4) found a correlation between consumption of essential amino acids (essential amino acids must be consumed in the diet) and LBM. Cats with CKD Stages 1 and 2 were fed either a control kidney diet or a higher calorie “test” kidney diet that included higher amounts of essential amino acids and carnitine, an amino acid derivative that plays a role in energy production in the body.

The cats eating the lower calorie control diet lost LBM whereas the other group of cats eating the “test” diet maintained their LBM. Researchers observed that the cats on the control diet did not eat enough food to get adequate amounts of essential amino acids. They found that essential amino acid intake, not total dietary protein, correlated with maintaining LBM.

Although offering reduced protein, most commercial kidney diets make sure that more than sufficient amounts of the essential amino acids are available. The challenge is to get cats with CKD to eat enough of the diets.

Other Supplements

Commercial diets for managing CKD in cats also supplement:

Potassium, an electrolyte essential to the function of muscles and nerves
B vitamins – these water soluble vitamins can be depleted as the cat drinks more water and urinates more
Fatty acids – fatty acids found in fish oils are thought to reduce inflammation and decrease protein in the urine

Starting a kidney Diet

Renal diets are typically recommended for cats in IRIS Stages 2, 3, and 4. Occasionally a reduced protein diet may be prescribed for a Stage 1 cat who has persistent protein in her urine. Many practitioners like to introduce therapeutic diets when the cat is in IRIS Stage 2, because the cat should still be feeling well and more likely to accept the new diet (Reference 3).

The best time to switch to a kidney diet is when your cat is eating her regular cat food well and is feeling well. Wait to introduce the new diet if…

Your cat has just come back from the hospital
You have visitors or are doing home remodeling
Your cat is not eating her regular food well
Your cat is vomiting or having diarrhea

Introduce the new diet gradually, over several weeks (Reference 1)


Week 1	Week 2	Week 3	Week 4
Offer 25% of the new diet and 75% of the current food	Offer 50% of the new diet and 50% of the current food	Offer 75% of new diet and 25% of the current food	Offer 100% of the new diet

Make sure to offer the appropriate amount of calories to your cat – the new renal diet will most likely be more caloric than the your cat’s current food and you will not need to feed as much.

tips for transitioning to a kidney diet

Choose a food similar to the one your cat is eating already – wet or dry? fish or chicken?
Offer the new food in a separate bowl alongside the regular food
Make sure to offer fresh food
Use a “topper” to encourage your cat to try the new food – fish flakes or a favorite treat
Try gently warming wet foods – the stronger smell may make the food more appealing
Meal feed your cat – small, frequent meals gives your cat more chances to try the new food
Avoid mixing medications into the new food – use a small amount of another food or pureed treat to give the medications

If you are struggling with a finicky cat, talk to your vet. If your cat is healthy, ask if you can do a trial of mirataz to stimulate his appetite and facilitate the transition to the new food.

Alternatives to a commercial kidney diet

Use a phosphorus binder in the food your cat will eat. Consult your veterinarian for the appropriate dose.
Home cooked diets are an option but should be formulated by a veterinary nutritionist. Nutritionists affiliated with websites such as balance.it will work with your vet to formulate a recipe for your cat.

Studies have shown that diets for managing CKD in cats can increase longevity, help control uremia and maintain phosphorus concentrations. While some have concerns about the protein restriction in these diets, kidney diets have been shown to maintain LBM providing the cat eats enough food to get sufficient nutrition.

New research is focusing on the connection between the kidneys and the GI tract, particularly the uremic toxins that originate in the gut. Prebiotic and probiotic treatments in CKD cats are being investigated to see if improving the health of the microorganisms living in the gut can reduce blood concentrations of gut-derived uremic toxins. (Reference 5)

references

Quimby, J. and Ross, S., Diets for Cats with Chronic Kidney Disease (CKD) [updated 2022]. http://www.iris-kidney.com/education/protein_restriction_feline_ckd.html [viewed 9/2023]
Phosphorus: Fact Sheet for Health Professionals, https://ods.od.nih.gov/factsheets/Phosphorus-HealthProfessional/, viewed 9/2023.
Cave, N. and Wall, M. Protein restriction for cats with chronic kidney disease, Vet Focus, Issue # 30.1, © 6/25/20
Hall JA, Fritsch DA, Jewell DE, Burris PA, Gross KL. Cats with IRIS stage 1 and 2 chronic kidney disease maintain body weight and lean muscle mass when fed food having increased caloric density, and enhanced concentrations of carnitine and essential amino acids. Vet Rec. 2019 Feb 9;184(6):190. doi: 10.1136/vr.104865. Epub 2018 Dec 4. PMID: 30514741; PMCID: PMC6589452.
Summers, S. and Quimby, J., The feline gut-kidney axis: food for thought, Veterinary Focus, Issue #33.1, 5/31/23, https://vetfocus.royalcanin.com/en/scientific/the-feline-gut-kidney-axis-food-for-thought, viewed 9/2023

Food and Your Cat’s Mental Health

Posted on July 9, 2023 by felinepurrspective_u3q4o6

Eating is a positive experience for healthy animals. Two neurotransmitters released while eating are dopamine and serotonin. Dopamine is associated with feelings of reward and motivation; serotonin with feelings of happiness and calmness. Thus, food is one of the ways we can induce a positive emotional state in a healthy cat.

Food and your cat’s mental health

Recent research points to two dopamine events when eating: the first when you actually eat the food and the second, when the food reaches your stomach. (Reference 1). On the other hand, rising serotonin levels act as an appetite suppressant, giving a feeling of satiety. (Reference 2)

The connection between food and your cat’s mental health provides us an opportunity to take advantage of the emotions triggered by dopamine and serotonin when eating.

Foods that calm

There are foods that incorporate tryptophan, a precursor to serotonin. Royal Canin’s Calm diet and Hill’s c/d Multicare Stress for cats contain hydrolyzed milk protein and L-tryptophan to reduce your cat’s fearful behaviors in stressful situations or environments. The caveat with these foods is that the cat must eat enough of the food to get the appropriate dose of tryptophan.

food and environmental enrichment

Engaging in foraging behavior can benefit cats with generalized or separation anxiety. (Reference 3)

Foraging can provide a cat that is vigilant, tense and easily aroused with an alternative outlet for her energy
Cats with separation anxiety will find foraging a rewarding activity that is not related to interacting with the owner.
Serotonin release during the foraging cycle promotes calm behavior.

Foraging Method 1 – Multiple Separate Feeding Stations

Divide your cat’s daily food ration into portions.
Place these in different places around the house.
Put some dishes up high or in boxes and closets for variety

Foraging Method 2 – Use of Food Puzzles

Cats have to use their paws to get the food
Vary in complexity and style

Food and your cat’s mental health: behavior modification

We can use the positive emotions triggered by eating to guide our cats’ behaviors. The use of a stream of small food rewards will trigger dopamine release, which in turn gives the cat feelings of reward and motivation. Food can be a powerful adjunct to some of the interventions used in veterinary behavioral care: (Reference 3)

counter conditioning
operant conditioning
differential reinforcement of alternate behaviors

These methods work best with foods that the individual cat finds particularly palatable and desirable.

counter conditioning and food

Counter conditioning refers to training a different response to a situation. Consider the cat carrier that takes your cat to the vet. Many cats have a fearful association with the carrier and the process of going into it. The goal of counter conditioning here is to teach the cat that good things happen when he’s near the carrier.

We start with getting the cat accustomed to the carrier by just leaving it out in the room. Once he is comfortable with the carrier left out, we can offer some treats close by the carrier and gradually work up to treats in the carrier. Over time, the cat will associate good things with the carrier – we have used food (treats) to change the cat’s emotional state when near the carrier.

operant conditioning and food

With operant conditioning, an animal repeats behaviors that have good consequences and avoids ones that are not rewarding. Say you ask your cat to “sit”. When he sits, you reward him with a treat (food) he likes. He will be more likely to sit next time in anticipation of getting his reward.

differential reinforcement of alternate behaviorS

Here you will be replacing an undesired behavior with one that is more appropriate to the situation. Say your new kitten attacks and hangs on to your legs as you as come in the door or you have a “door-dashing” cat. You could train (operant conditioning) your kitten/cat to jump up on a nearby shelf or table on cue for a food reward when the door is opened. (The cue can be spoken or you could jingle your keys.) The goal is to replace the attacking/door dashing behavior with sitting on the nearby piece of furniture.

Food makes our cats feel good. Neurotransmitters such as dopamine and serotonin promote positive emotions when eating. This connection between food and your cat’s mental health provides you with opportunities to influence your cat’s behavior through diet, environment and training.

references

1. Cell Press. “Your brain rewards you twice per meal: When you eat and when food reaches your stomach.” ScienceDaily. ScienceDaily, 27 December 2018. <www.sciencedaily.com/releases/2018/12/181227111420.htm>.

2. Voigt JP, Fink H. Serotonin controlling feeding and satiety. Behav Brain Res. 2015 Jan 15;277:14-31. doi: 10.1016/j.bbr.2014.08.065. Epub 2014 Sep 16. PMID: 25217810.

3. Delgado M, Dantas LMS. Feeding Cats for Optimal Mental and Behavioral Well-Being. Vet Clin North Am Small Anim Pract. 2020 Sep;50(5):939-953. doi: 10.1016/j.cvsm.2020.05.003. Epub 2020 Jul 8. PMID: 32653265; PMCID: PMC7415653.

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The Behavior of Feeding – Why Separate Cats When Feeding

Posted on June 18, 2023July 9, 2023 by felinepurrspective_u3q4o6

Gus eyes Athena’s dinner and prepares to move in.

Solitary hunters, cats will eat or cache their prey after a successful hunt. Mother cats will bring prey back to their kittens to teach them how to hunt and what to eat but cats typically DO NOT SHARE their prey. They will growl when eating to warn other cats off.

In photos taken on the “cat islands” of Japan (called neko shima), cats line up at dishes of food put out by the island residents. There are 11 islands in Japan that have more cats than people on them. There are not enough mice for the cats to eat so residents of the islands provide food for the cats. Feeding times appear to go smoothly on the cat islands with the occasional spat between cats. The island residents do put out food in more than one location so a cat can always move to another feeding station if he gets into a fight over food. Contrast this with our picture of a wild cat, a solitary hunter, munching his mouse in solitude.

Our indoor cats don’t have the option of leaving if they are the target of food aggression. Although cats may appear to get along eating next to another cat or out of the same bowl, cat behavior experts recommend that we separate cats when feeding, preferably out of sight of other cats. (Reference 1)

Why separate cats when feeding?

Cats with more dominant personalities will nose smaller, more timid cats out of the food bowl.
Victim cats may gorge and eat their food quickly, leading to “scarf and barf”.
Victim cats may start to lose weight.
House-soiling issues can start if the “bully” decides the game should extend to resources other than the food bowl.

These behaviors can be subtle. The “thief “at first just sits quietly near the “target” cat and stares at her. The target may stop eating. There may be some fisticuffs as the target tries to keep eating. Eventually the thief just noses the target out of the bowl, and the target cat leaves.

Strategies to separate cats when feeding

Assign each cat his own food station out of sight of the other cats. If you are meal feeding, you can fill each station with a cat’s portion and call each cat to his station as you place them around the house. Collect the feeders in 15-30 minutes as the cats finish their meals. If you like, you can offer the meals in food puzzles, one per cat.

Locations of feeding stations

You may be able to take advantage of your cat’s preferences when deciding where to locate her feeding station. Some cats like to be up high and can be fed on their cat tree or tops of shelving units.

Closets can also make good feeding stations. Cats who like to be up high can eat on the top shelf and may just need a step ladder, storage cubes that form a ladder, or a single pole cat tree to get up there. If you just need to keep the family dog out, a gadget called a “Door Buddy” can work.

Baby gates can be used to block off doors to closets or rooms to separate cats. Although an agile, determined cat can easily scale a baby gate, this is usually pretty difficult for a dog.

feeding stations

Microchip Feeders

If you are dealing with cats on different diets or cats that eat slowly or “graze”, microchip feeders such as the SureFeed Microchip Pet Feeder are worth the cost. These feeders will only open for the cat or cats they are programmed for.

Enclosures for Feeding

A “Meow Space” is a deluxe feeding enclosure. It is ventilated and has a locking pet door which can be accessed by microchip or collar tag. Like a microchip feeder, the “Meow Space” will only open for the cat or cats it is programmed for.

A plastic pet carrier can make a great “kitty diner”. Each cat can eat in his own carrier. If one cat finishes before another, the gate can be closed until the slower eater is done. This also helps your cat become more comfortable with his/her carrier.

Tip: Make a carrier cover that will “camouflage” the carrier, matching your color scheme and decor.

not enough room to separate cats when feeding?

Consider feeding social groups together. Cats who belong to the same social group prefer to spend time with each other and are often willing to share resources such as food and litter boxes.

How do you know if cats are affiliated? The following behaviors can help you identify the social groups in your home.

Sleeping the same room
Allogrooming (grooming each other)
Sleeping touching each other
Touching noses

Note who does what and with whom, then diagram the social groups in your house. You may be able to feed cats in a social group in the same area. It is still recommended for each cat to have a separate bowl, be spaced apart, and to meal feed the kitties.

Separating your cat from other animals while eating allows your cat to feed in the same way as a wild cat. Feeding alone helps avoid behaviors like gorging and vomiting which can affect a cat’s physical and mental health. Although it can be a challenge to separate cats when feeding, attention to each cat’s preferences and identifying the social groups in your home can help you develop a feeding strategy.

references

1. Sadek,T. (chair) “Feline Feeding Programs:Addressing behavioral needs to improve feline health and wellbeing” Journal of Feline Medicine and Surgery (2018) 20, 1049-1055

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The Behavior of Feeding – Why Meal Feed Your Cat

Posted on June 11, 2023June 18, 2023 by felinepurrspective_u3q4o6

Leaving tasty kibble out all day is like a having a bowl of potato chips on the counter.

A wild cat’s day begins in the late afternoon. He is an opportunistic feeder, a generalist, who will eat anything from bugs to bunny rabbits. He may snack on a lizard, sunning in the late afternoon sun. As the shadows grow longer, he will go on the prowl, looking for the small rodents that make up most of his diet. If he is lucky enough to catch something, he will retire and dine al fresco, alone. He will then doze or nap a bit while his meal digests. If he is part of a cat colony, he may groom or play with the kittens, while their mothers hunt.

In a few hours, he’s off to hunt again and will keep on prowling, looking for prey. He is not above scavenging a meal from other animals’ leftovers or from human garbage. His stomach is small and he will eat a 6-10 meals as he hunts through the night. When the sun starts to rise, he will turn in for the day, sleeping, grooming and sunning.

The behavior of feeding – why meal feed your cat

Our indoor cats have chosen a different lifestyle. They depend on us, their human caretakers, for their food. They may be fed in one location with other cats, once or twice a day or be free fed from a large bowl of kibble available 24/7 (Reference 1).

The Problem with The big bowl and free feeding

Imagine a big bowl of potato chips or crisps left on the counter. You pick one or two as you go by. It is very easy to continue snacking and before you know it, that bowl is getting empty. In the same way, it is easy for a cat to eat too much of palatable and caloric kibbles left out, nibbling a little at a time.

Free feeding with more than one cat in the home

Cats with more dominant personalities will nose smaller, more timid cats out of the food bowl.
Victim cats may gorge and eat their food quickly, leading to “scarf and barf”.
Victim cats may start to lose weight.
House-soiling issues can start if the “bully” decides the game should extend to resources other than the food bowl.

The behavior of feeding – what can we learn from wild cats?

Cats have evolved to eat multiple, small, low calorie meals every day.
Cats prefer to eat alone – without other cats around.
Cats spend most of their waking hours hunting and foraging for food.

the take-away for indoor cats

Meal feeding reflects the way cats naturally eat.
Cats need to be fed separately from other pets (cats, dogs) in the house.
Cats need to engage in hunting/foraging behavior.

Choosing to meal feed your cat

It does not need to take a lot of time and effort to meal feed your cat. Divide your cat’s daily allotment of food into 4-5 portions. Your cat will be happier – he will have more to look forward to and his food will be fresher, as smaller portions will be put out frequently instead of topping up the bowl. Check out the Meal Planner below – mix and match the meals that work for you!

Meal #1

If your cat enjoys wet food, offer a wet meal when you are home to pick up the dishes. Choose an amount your cat can finish in 15 minutes or so.

Timed Puzzle Feeder — This Cat Mate feeder can accommodate a food puzzle.

Meal #2

Dry food can be placed in bowls or feeders around the house. You can change the locations of these daily if you like to keep your cat on his game. Timed feeders can meter out the food while you are away.

Cats plays with featther toy1 — Core workout – Zelda plays with feather toy!

Meal #3

Hunting practice: play with your cat with a fishing pole toy for a few minutes. Make sure to end the game with a small snack.

Zelda has the treat in sight, ready to pounce.

Meal #4

Tossing treats or kibble: Zelda chases dental kibbles down the hallway and pounces on them as if they were grasshoppers. This can be a fun game with larger kibbles like those from dental foods, where 10-15 pieces of kibble are about 30 kcal.

cat with food puzzle — Marley works the Poker Box, a food puzzle.

Meal #5

Food puzzles offer foraging opportunities to cats. But be forewarned: most cats are lazy – they will choose food that they do not have to do anything for. You have to meal feed for this to work – otherwise, the cat will just go and snack out of his bowl.

More About Food Puzzles

Most likely, you will need to “train” your cat to use a food puzzle. Once your cat learns one, she will pick up on others more quickly. When your cat knows how to do several of these puzzles, you can rotate them to keep her interest. For more about the psychology of food puzzles and training your cat to use one, see “Cats Eating From a Food Puzzle: Contrafreeloading?“

Choosing to meal feed your cat allows him to engage in more natural feeding behaviors. It will be easier for you to regulate his intake which is better for his health and longevity. With a little bit of creativity and using the Meal Planner, you should be able to meal feed your cat, whether she is a dry food addict or eats a combination of wet and dry foods.

references

Sadek,T. (chair) “Feline Feeding Programs:Addressing behavioral needs to improve feline health and wellbeing” Journal of Feline Medicine and Surgery (2018) 20, 1049-1055

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Choosing a Diet for Your Cat – Wet or Dry?

Posted on June 4, 2023 by felinepurrspective_u3q4o6

Daily Food Portion Cat — Gus looks at his daily food allotment. Treats count!

What should you feed your cat – wet food? dry food? a mixture?

A diet for your cat – wet or dry must be balanced and nutritious. Dry cat food is convenient and less costly than wet foods. It can be left out without as much concern for spoilage. You don’t have to be home to feed your cat. But will your cat drink enough water? How do wet and dry foods compare with regard to providing your cat enough protein and not too many calories?

Choosing a diet for your cat – wet or dry?

moisture

A wild cat gets most of his moisture from the prey he eats. He typically consumes the entire animal, including the fur and gut contents and eats the equivalent of 6-10 mice a day.

Wet cat foods typically contain 80% moisture by weight. Dry foods are closer to 10% by weight. Cats eating a dry diet must supplement their diet by drinking water.

Let’s look at the moisture some typical foods would offer a 10 lb cat eating 200 kcal daily.

	Food 1 (wet)	Food 2 (wet)	Food 3 (dry)	Food 4 (dry)
Moisture (%)	78	80	12	12
Metabolizable Energy (kcal/kg)	942	700	4342	3770
Cat’s weight (lbs)	10	10	10	10
Amount of food daily (g)	212	285	46	53
Moisture from food ( ml)	165	228	5.5	6.4
Moisture in food (ounces)	5.6	7.7	0.19	0.22

This table shows how much moisture (water) our cat will get by eating 200 kcal of each of these foods. The wet foods provide about 6-8 oz daily where the dry foods provide a fraction of that.

but my cat drinks plenty of water…

Cats should drink about 4 ounces of water per five pounds of lean body weight daily. Our 10 pound cat needs to drink about one cup of water per day. If he does not drink enough, he may become constipated or risk having urinary crystals. If he eats the wet diet, he will get most of this water in his food.

But, you say, my cat drinks plenty of water. She is at the water bowl frequently. Cats don’t scoop water up with their tongues, instead when the curled-back tip of the tongue touches the water surface, a thin column of liquid is drawn up into the mouth. That column of water is about 3/100 of a teaspoon. A lot of lapping is needed to reach 1 cup of water daily.

If your cat’s stools tend to be hard or her skin around her shoulders doesn’t snap back quickly when you tent it, you may want to encourage her to drink more or add some canned food to her diet.

choosing a diet for your cat – wet or dry: protein

A diet for your cat -wet or dry should provide your cat with enough protein to maintain Lean Body Mass (LBM).

If you compare foods on a dry matter basis (removing all the water), protein content can look similar, at 40-50%. Wet foods, however, often have a higher protein/energy ratio – they deliver more protein per 100 kcal than dry cat foods. The carbohydrate needed to process the dry foods may be the culprit here – the amount of protein is diluted by the additional calories provided by the carbohydrate.

In this chart, you can see that our 10 lb cat will more than satisfy his LBM protein requirements with 200 kcal of Food 2; he will be close with Food 1. The two dry foods require 230-240 kcal to provide enough protein to satisfy the LBM . These additional calories could result in weight gain. (These calculations are done on an “as-fed” basis using the Atwater equation).

	Food 1 (wet)	Food 2 (wet)	Food 3 (dry)	Food 4 (dry)
Metabolizable Energy(kcal/kg)	942	700	4342	3770
Protein (g/100 kcal)	10.6	15.7	9.7	10
Cat’s weight (lbs)	10	10	10	10
Protein for LBM	23	23	23	23
Calories Needed to Satisfy LBM (kcal)	216	146	237	230

a diet for your cat – wet or dry: calories

Dry cat foods tend to be more “calorie dense” than the canned foods. The dry foods in the table have over 4 x the amount of kilocalories per kg of food of the wet foods. Dry food is concentrated – a small amount has a lot of calories. A bored cat can easily eat too much and put on weight. The water in the wet foods tends to fill our cats up and give them a feeling of satiety.

choosing a diet for your cat – wet or dry?

A lot boils down to your cat’s preferences. Both dry and wet diets provide balanced nutrition but wet foods provide your cat with

water
higher protein/energy
lower calorie meal plan

a compromise: wet and dry

If your cat will eat wet and dry, consider a combination feeding program. Here is one where your cat gets two wet meals that are supplemented with tasty dry food in between in food puzzles, as training treats, or in a treat toss game. The two wet meals can go a long way to providing your cat with moisture and protein to maintain LBM.

Breakfast: wet meal
Day Time: food puzzles or feeders with dry food
Dinner: wet meal
Bedtime Snack: Treat Time – treat toss or training ( sitting , targeting )

My cat refuses wet foods

Some cat prefer dry food. Why?

Food preferences are established when cats are kittens. They eat what their mother eats.
If the kittens do not eat wet foods at weaning and the first few months afterwards, they will often refuse to eat them later.
This can be a problem when cats become older and wet food can help manage medical conditions, such as kidney disease. (Reference 1)

The pet food industry works hard to make those kibbles appealing to cats. Not only is there the texture or “mouth feel”, the kibbles are often sprayed with protein hydrolysates or “digest” to increase palatablity. Soy sauce is an example of protein hydrolysates used to enhance the taste of foods for humans. (Reference 2)

for dry food addicts only…

Make sure to hydrate your cat – try water from tuna, water used to poach chicken or fish (offer alone, add to the water bowl, or try frozen in an ice cube tray and added to the water bowl) (Reference 3)
Try some of the high protein, low calorie (low fat, low carb) dry diets.
Try moistening your cat’s kibble with low-sodium chicken broth.
Try mixing some canned food with your cat’s dry. Start with a small amount and increase if she accepts it.

references

Zoran, Debra. “Feline Nutrition: Understanding How to Feed Cats for Obesity Prevention and Weight Management”, dvm360.com, 11/10/13
Ahmet Yavuz Pekela, Serkan BarışMülazımoğlub and Nüket Acar(2020) “Taste preferences and diet palatability in cats,” Journal of Applied Animal Research, 48:1, 281-292, DOI:10.1080/09712119.2020.1786391
Caney, S., Gunn-Moore, D. Caring for a cat with lower urinary tract disease, Cat Professional 2011, www.catprofessional.com, p. 45

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How Many Calories Should Your Cat Eat in Day?

Posted on May 28, 2023 by felinepurrspective_u3q4o6

If your cat consumes more calories than she burns, she will gain weight. So, how many calories should your cat eat in day to maintain a healthy body weight?

Like people, cats are individuals; some have higher metabolisms than others. Things that affect how heavy or thin a cat is include (Reference 1):

Genetics
Sex
Spayed? neutered?
Hormonal changes eg. hyperthyroidism, diabetes

The feeding guidelines on cat food cans or packages are a start but they can be misleading. Many of these guidelines are based on feeding intact cats and often recommend 25-35% more food than most housecats (spayed or neutered) need to eat. Immediately after spaying or neutering, the cat undergoes hormonal changes (changes in estrogen, progestin, insulin-like growth factor) that affect metabolism. The results are an increased appetite, decreased energy requirements, changes in glucose tolerance and fat metabolism. (Reference 1)

How Many Calories Should Your Cat Eat in a day?

A Rule of Thumb

Most average-sized (9 to 11 pounds) spayed and neutered cats need to eat about 200 kcal daily to maintain lean body condition.
Neutered males may need to eat less, about 180 kcal/day. (Reference 1)

Monitor your cat’s body condition

Be attuned to factors that can lead to weight gain or loss, such as disease (hyperthyroidism), feeding behavior (a cat eats another cat’s food) or lifestyle change (access to a catio).
Monitor your cat’s body weight, his body condition score and his muscle condition score regularly.

How Many Calories Should Your Cat Eat?

Weigh Your Cat

You can weigh your cat at the veterinary clinic but, even better, purchase a baby scale to weigh your cat at home. This is more convenient, especially if your cat is on a weight-loss program and needs to be weighed frequently. You can make this fun by training your cat to get on the scale for a yummy reward (something low calorie, of course!)

“How Do I Look” – the Body Condition Score (BCS)

Look at your cat’s profile from above and from the side. Ideal body condition is defined as a visible waist (when viewed from above) and tummy tuck (side profile). You should be able to easily feel his ribs under his skin and fur. Compare what you see with the pictures on the Body Condition Chart. Give your cat a score.

Once you know your cat’s weight and Body Condition Score, you can get a calorie estimate from a convenient calculator at https://petnutritionalliance.org/resources/calorie-calculator?type=cats

How Many Calories Should Your Cat Eat?

Here are some photos of Gus, who currently weighs 12.50 pounds. You can feel his ribs but there is some fat over them. His waist and shoulders are distinguishable but he does not have much of an abdominal tuck. We will give him a BCS of 6. The Pet Nutrition Alliance site recommends an ideal weight of 11.4 lbs and 216 kcal daily for weight loss.

Lean Body Mass and Healthy Weight

In a previous post, we talked about Lean Body Mass (LBM) and the benefits of a higher LBM for cats:

A higher percent of muscle will boost your cat’s metabolism
Make it easier for her to maintain a health body weight
Can help your cat live longer.

Choosing a diet to promote LBM – A Math Problem

Studies indicate that to maintain LBM, a cat should consume around 5.2 g protein per kg or 2.3 g protein per pound. (Reference 2). Using your cat’s weight, you can multiply by 2.3 (weight in pounds) or 5.2 (weight in kg) to estimate the protein he or she needs. Gus weighs 12.5 lbs and needs 28.8 grams of protein daily.

Here are two canned foods and two dry foods, with guaranteed analysis and protein content. As you can see in the chart, there is only one food (wet) out of the 4 foods that will provide Gus with the protein he needs while he loses weight eating 216 kcal daily. Food 2 can give him the 28.8 g protein in 183 kcal. (See “How Much Protein Should You Feed Your Cat?” for estimating the amount of protein in a food.)

	Food 1 (wet)	Food 2 (wet)	Food 3 (dry)	Food 4 (dry)
Crude Protein (%)	10	11	42	42
Crude Fat (%)	5	2	19	9
Crude Fiber (%)	1.5	1.5	3.2	5.0
Moisture (%)	78	80	12	12
Ash (%)	3.2	3.5	0	0
Carbohydrate (%)	2.3	2	23.8	32
MER (kcal/kg)	942	700	4342	3770
Protein (g/ 100 kcal)	10.6	15.7	9.7	11.1
Cat’s weight (lbs)	12.5	12.5	12.5	12.5
Protein for LBM	28.8	28.8	28.8	28.8
Calories of Food Needed (kcal)	270.8	183.0	297.2	258.1

The muscle condition score

There is one more thing we need to monitor – the cat’s Muscle Condition Score (MCS). Loss of muscle over the spine, shoulder blades, skull, and hips (that “bony” feeling) is an indicator of LBM loss. Although you cannot prevent loss of muscle due to aging, you may be able to slow it down by feeding a higher protein diet. Here is a chart to help score the muscle condition. Gus, at age 7, still has normal muscle mass, which we will try to maintain by ensuring he gets enough protein in his diet.

Feeding your cat is more than just how many calories should your cat eat. We must balance calories and nutrients and monitor weight, BCS and MCS regularly to make sure the feeding plan is working. AAFCO labeled foods ensure that your cat receives the basic nutritional requirements. Optimal nutrition for the individual cat, especially one with medical conditions, may require a more detailed plan and possibly the services of a board-certified veterinary nutritionist.

references:

Zoran, Debra. “Feline Obesity: Clinical Recognition and Management” Compendium, June 2009 (Vol 31, No 6).
Laflamme DP, Hannah SS. Discrepancy between use of lean body mass or nitrogen balance to determine protein requirements for adult cats. Journal of Feline Medicine and Surgery. 2013;15(8):691-697. doi:10.1177/1098612X12474448

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How Much Protein Should You Feed Your Cat?

Posted on May 21, 2023June 3, 2023 by felinepurrspective_u3q4o6

Your cat evolved to eat a diet high in protein. How much protein should you feed your cat? Research suggests feeding enough protein to maintain Lean Body Mass.

Measuring Protein in Food

Nitrogen Balance

The protein content of a food is determined by measuring the nitrogen in it. The difference between the nitrogen we that take in (by eating food) and the nitrogen we put out (in urine) reflects the gain or loss of total body protein and is called the nitrogen balance. Traditionally, the amount of protein that maintains a zero nitrogen balance was considered the minimum protein required to be healthy. [Reference 1]

Nitrogen is one of the most common chemical elements in the universe. The atmosphere surrounding the Earth is about 78% nitrogen. Proteins, those molecules in our bodies that are used to build and repair tissues and act as hormones or enzymes, contain nitrogen.

Lean Body Mass

Recent research in both human and animal nutrition suggests that it is not enough just to maintain a zero nitrogen balance – animals and humans should consume enough protein to maintain their Lean Body Mass (LBM). Lean body mass is the difference between total body weight and the weight of body fat. LBM is made up of the muscle and internal organs.

Muscle and internal organs have a higher metabolic rate than fat. So, a higher percentage of muscle will boost your metabolism, help you maintain a healthy weight, and may help you to live longer. [Reference 2]

How much protein should you feed your cat?

A study followed 24 adult neutered male cats over several months to compare the amount of protein necessary to achieve nitrogen balance with the protein required to maintain LBM (measured by dual energy x-ray absorptiometry or DEXA).

The cats were divided into 3 groups and fed diets with different amounts of protein: one group received a “low” protein diet, the second a “moderate” protein diet and the third group was given a “high” protein diet. [Reference 1]

Results: more dietary protein was required to maintain LBM than to satisfy the nitrogen balance.

Nitrogen balance was maintained with 1.5 g protein/kg (0.7 g/pound) of body weight.
LBM was maintained with 5.2 g protein/kg (2.3 g/pound) of body weight .

how much food will give your cat enough protein?

There is no easy answer to this. Not only are there differences in the metabolisms of individual cats and different food formulations, not all the energy in that can or bag of cat food can be metabolized.

To measure how much metabolizable energy (ME) a particular cat food provides your cat, you would need to do a “feeding study”. Such a study measures what goes into the cat and what comes out. The difference is what is metabolized.

Feeding studies are expensive so the pet food industry has devised formulas to estimate the amount of metabolizable energy (ME) in a food using the guaranteed analysis on the pet food label. (The percentage of carbohydrates can be calculated by adding up the protein, fat, crude fiber, moisture and ash listed in the guaranteed analysis and subtracting this total from 100%.)

One of the simpler formulas used is the Atwater equation shown below. [Reference 3]

ME (kcal/kg) = [4x Crude Protein(%) + 4 x Carbohydrate (%) + 9 x Crude Fat (%)] x 10

Nutrients for feeding guidelines are reported per 100 kcal of ME. To find out how much protein your cat food provides per 100 kcal of metabolizable food, we return to the crude protein estimate and reference it to the ME.

Grams protein/ 100 kcal ME = [Crude Protein(%) x 1000] / ME (kcal/kg)

How much protein should you feed your cat? Let’s look at some protein estimates using values from a few typical food labels. These calculations are done on an “as fed” basis.

	Crude Protein (%)	Carbohydrate (%)	Crude Fat (%)	ME (kcal/kg)	Protein (grams/100 kcal)
Canned A	12	2.1	2.2	762	15.7
Canned B	10	3.8	5	942	10.6
Dry A	43	24.5	19	4410	9.8
Dry B	33.5	30.6	21.1	4463	7.5

Let’s take the example of a 10 lb or 4.5 kg cat in average condition – not fat, not thin. Per the research referenced above, this cat would need about 23 grams of protein daily.

The average 10 lb cat burns about 200 kcal daily. Looking at the foods above, 200 kcal of Canned A would give our 10 lb cat more than 23 g protein; Canned B gives him 22 g, a little short of the daily goal. Neither of the dry foods provide enough protein in 200 kcal to meet the lean body mass requirement: Dry A provides 19.6 g per 200 kcal and Dry B, 15 g per 200 kcal.

How much protein should you feed your cat?

- The 5.2 g protein/kg body weight is the result of two studies – more work is needed to establish accurate protein requirements.
- Protein requirements may vary with age, gender, and breed.
- Medical conditions such as chronic kidney disease can also affect your cat’s protein requirements.

Your veterinarian is a good resource for helping you figure out how much protein to feed your cat. He or she can assess your cat’s body and muscle condition and health to determine if your cat is receiving enough protein and calories.

In our next post, we will consider how many calories your cat should eat every day and how Body Condition Score and Muscle Condition Score can give you an idea of your cat’s body composition, muscle-to-fat ratio and nutritional status.

references

Laflamme DP, Hannah SS. Discrepancy between use of lean body mass or nitrogen balance to determine protein requirements for adult cats. Journal of Feline Medicine and Surgery. 2013;15(8):691-697. doi:10.1177/1098612X12474448
Zhang X, Wang C, Dou Q, Zhang W, Yang Y, Xie X. Sarcopenia as a predictor of all-cause mortality among older nursing home residents: a systematic review and meta-analysis. BMJ Open. 2018 Nov 12;8(11):e021252. doi: 10.1136/bmjopen-2017-021252.
Asaro NJ, Guevara MA, Berendt K, Zijlstra R, Shoveller AK. Digestibility Is Similar between Commercial Diets That Provide Ingredients with Different Perceived Glycemic Responses and the Inaccuracy of Using the Modified Atwater Calculation to Calculate Metabolizable Energy. Vet Sci. 2017 Nov 8;4(4):54. doi: 10.3390/vetsci4040054.

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Feeding Your Cat A Complete and Balanced Diet

Posted on May 7, 2023May 7, 2023 by felinepurrspective_u3q4o6

In the last post, we spoke about your cat and some of her unique nutritional needs. She is an obligate carnivore, designed to eat small animals but she does have some flexibility and can use carbohydrates for energy. Lean times are hard for cats and their livers are slow to process stored fat. Unlike other mammals, her body does not synthesize the amino acids, taurine and arginine, and these must be provided in her diet.

Cats dine on small rodents, rabbits, birds, reptiles and insects. They will consume the entire animal, fur, tendons, blood, gut contents… Even if your cat is an active outdoor hunter, you are going to offer her some food and will probably turn to some of the many commercial cat foods available.

feeding your cat A complete and balanced diet

A feral cat gets about 52% of his energy from protein and 46% from the fat of the prey he eats. Your cat will need a diet with protein and fat. Like other animals, the cells in his body require glucose (a carbohydrate) to function. Cats typically use proteins for energy and produce glucose via gluconeogenesis, regardless of fasting or starvation. But cats are flexible and if they consume a minimum amount of protein, they can use dietary carbohydrate as a source of glucose, and spare the proteins for other tasks, such as building and repairing tissues and acting as hormones (reference 3). When feeding your cat, you will want to offer him some fat and carbohydrates, in addition to protein.

How much fat? carbohydrates? protein?

Like people, cats are individuals and their dietary intake varies. Most of the time, we feed our cats and note if they gain or lose weight, and adjust their intake accordingly.

What is a complete and balanced diet for a cat? A complete and balanced diet will provide the cat all the nutrition she needs, including essential amino acids, protein, fat and minerals. Most pet foods on the market will have a label stating that the food is formulated according to the guidelines established by the American Association of Feed Control Officials (AAFCO) or in Europe, the European Pet Food Industry Federation (FEDIAF). We look briefly at the AAFCO guidelines.

About AAFCO

The original guidelines were formulated in 1990 and have been revised several times; the latest iteration was in 2007-2008. The guidelines establish nutrient concentrations for ingredients typically sourced for pet food. Nutrients include protein, fat, essential amino acids, vitamins and minerals.

AAFCO profiles guarantee that the product contains the minimum (or maximum) concentrations for the nutrients in the profile. For example, protein in excess of the minimum concentration is acceptable whereas a maximum concentration for Vitamin D avoids concerns with toxicity. There are two profiles for cats: one for “growth and reproduction” and a second for “adult maintenance”. The chart below shows the recommendations for fat and protein in cat foods. (Reference 1)

AAFCO Nutrient Profile	Protein	Fat
Growth & Reproduction	30%	9%
Adult Maintenance	26%	9%

The Cat Food Label:

The label that goes on a can or bag of cat food has eight items. We will focus on item 4: the Guaranteed Analysis. This is a list of the percentage of each of the nutrients in the food. The minimum percent of crude protein and crude fat, and the maximum percent of crude fiber and moisture must be included. (See Feeding Your Cat: Choosing a Food for more about AAFCO labels).

Fats

There is not an established requirement for fat. The minimum concentration of 9% in the AAFCO guidelines is based on recognition of the role that fat plays in the diet: a source of essential fatty acids, a carrier of fat-soluble vitamins, enhances palatability, and supplies adequate calories. (Reference 1)

Fats are used for energy (providing 9 kcals/g) and if there is more fat than the cat needs in his diet, he will store it – like those “chonky” cats on the internet. Fats also increases the palatability of the diet and may encourage over-eating. There are low-calorie diets containing less than 9% fat that have an AAFCO label.

Carbohydrates

Carbohydrates are not listed in the guaranteed analysis. An estimated percentage of carbohydrates can be calculated by adding up the protein, fat, crude fiber, moisture and ash listed in the guaranteed analysis and subtracting this total from 100%. (Reference 2).

In the wild, cats eat a diet that is primarily protein and fat. This leads many folks to think that cats do not need or use carbohydrates. But like other animals, their cells require glucose to function. They can either get this by breaking down protein or from dietary carbohydrate.

Carbohydrates are necessary in the processing of commercial cat food, particularly kibble. Most commercial dry foods contain 33-45% as carbohydrates (dry matter)(Reference 4); canned foods tend to have less than 10%.

Some carbohydrates in the cat’s diet will not present a problem providing he gets enough protein. Too much carbohydrate (even highly digestible carbohydrates) can cause diarrhea, flatulence and bloating (Reference 3). Feeding your cat too much carbohydrate can also “dilute” the protein in the food – the cat may reach satiety before getting his necessary protein. Diets greater than 60% dry matter risk nutrient unbalance. Even smaller amounts (50% dry matter) can be a problem – for example, kittens need a lot of protein and too many carbohydrates will reduce the protein available to them. (Reference 4)

And Now for Protein…

Your cat is an obligate carnivore and protein is an essential part of a cat’s complete and balanced diet. Cats have distinct dietary requirements for protein and these will be the subject of the next post in “Feeding Your Cat”.

References

AAFCO Methods for Substantiating Nutritional Adequacy of Dog and Cat Foods. https://www.aafco.org/
Heinz, C. “Carb Confusion: Part 2. Measuring and Comparing Carbohydrates in Pet Foods” (9/27/21) https://vetnutrition.tufts.edu/2021/09/carb-confusion-part-2-measuring-carbs/.
Verbrugghe A, Hesta M. Cats and Carbohydrates: The Carnivore Fantasy? Vet Sci. 2017 Nov 15;4(4):55. doi: 10.3390/vetsci4040055. PMID: 29140289; PMCID: PMC5753635.
Kirk, Claudia. “Feline Nutrition: What Is Excess Carbohydrate?”. Purina Companion Animal Nutrition Summit: Tackling Myths About Pet Nutrition, Atlanta, GA March 21-23, 2013.

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Three Things to Know When Feeding Your Cat

Posted on April 30, 2023May 5, 2023 by felinepurrspective_u3q4o6

Cats are what we call “obligate carnivores” – they have evolved to eat a diet primarily of animal meat. They have small stomachs, short intestinal tracts, and are designed to eat frequently. A feral cat eats eats the equivalent of 6-8 mice as he hunts from dusk to dawn. In addition to small rodents, reptiles, birds, insects, and rabbits are also on the menu. He consumes the entire prey, including the blood, hair, skin, bones, tendons, and gut contents. These prey are high in protein, have some fat, but little carbohydrate. A feral cat gets about 52% of his energy from protein and 46% from the fat of the prey he eats.

This post is the first in a series that aims to highlight things you need to know when feeding your cat.

Three things to know when feeding your cat

Essential Amino Acids

Amino acids are the building blocks of proteins, those molecules that are used to build and repair tissues and act as hormones or enzymes, among other roles.
Amino acids not synthesized in the body are called essential amino acids and must be consumed in the diet. The 9 essential amino acids required by most mammals are: histidine, isoleucine, leucine, lysine, methionine, phenylalanine, threonine, tryptophan, and valine. (Reference 1)

Cats must consume two additional amino acids: arginine and taurine. (Reference 1)

Taurine (for vision, cardiac muscle function and the function of nervous, reproductive and immune systems). Sources are meat, poultry (in particular the heart) and fish.
Arginine (for making proteins, stimulating the release of growth hormone and insulin, helps eliminate ammonia from the body). Sources are animal tissue.

#1. These 11 essential amino acids will be supplemented in cat foods that are formulated according to the AAFCO feeding guidelines.

Feeding Your Cat – Can Cats Digest Carbohydrates?

Cats in the wild eat a diet high in protein and fat, with little carbohydrate. Carbohydrates (grains, corn, potatoes, legumes) are needed to make dry commercial pet foods. Carbohydrates are combined with other nutrients to make a “dough” that is formed into kibble and cooked. These foods certainly are convenient and many cats like them, but can they digest the carbohydrates in these foods?

CATS AND CARBOHYDRATES

Dietary carbohydrate provides glucose to the cells for most species including humans. If there is not enough dietary carbohydrate, proteins can be used as a glucose source via the process of gluconeogenesis. Gluconeogenesis occurs in the liver and is activated for most species during fasting and starvation.

In contrast, cats are obligate carnivores and consume a diet high in protein in the wild. They typically use proteins for energy and produce glucose via the gluconeogenesis pathway, regardless of fasting or starvation. Glucose can be stored in the tissues in the form of glycogen (Reference 2).

#2. Cats have low levels of the enzymes needed to digest carbohydrates in their saliva and gastrointestinal tract. However, recent studies have found that adult cats can digest carbohydrates added to a meat-based diet, providing the starches and grains are processed appropriately, for example, by cooking.

These studies also show that cats can increase or decrease protein metabolism depending on how much protein is available. For this to happen, the cat has to eat a minimum amount of protein. After that threshold (about 15% metabolizable energy in cats) is reached, cats can use carbohydrates to produce glucose, sparing the proteins for other essential processes in the body, such as building and repairing tissues and acting as hormones. (Reference 3)

feeding your cat – make sure your cat eats every day

The Process of Starvation

Cats are designed to eat frequently. When faced with dwindling food supplies, the cat will initially use glycogen for energy. Once glycogen stores are depleted, amino acids are mobilized from lean muscle. Within a few days, the cat’s body will start to use fat stores for energy.

The fat moves to the liver to compensate for the fat that would normally be eaten in food. The cat’s liver can only process so much fat at a time and, consequently, fat can accumulate in the cat’s liver (“fatty liver syndrome”) and prevent the liver from functioning properly.

Hepatic Lipidosis – “Fatty Liver Syndome”

The liver of a cat with hepatic lipidosis may triple in size due to accumulation of fat.
Hepatic lipidosis is associated with anorexia (not eating).
The onset can be rapid, maybe 2-7 days.
Hepatic lipidosis can be FATAL!

Treatment of the Yellow Cat

The typical patient with hepatic lipdosis is a cat around 7 years old who is overweight. Clinical signs include lack of appetite, vomiting, diarrhea and lethargy. As the disorder progresses, the cat’s ears, mouth and skin may take on a yellowish hue.

Cats with hepatic lipidosis require nutritional support and intravenous fluids to correct dehydration and electrolyte imbalances. Diagnostic bloodwork is done to identify possible underlying disease.

A feeding tube may be passed through the nose into the stomach or placed surgically in the esophagus via an incision in the neck.

With appropriate care, most patients survive although recovery often involves 3-6 weeks of tube feedings.

#3. Please seek veterinary care promptly if your cat does not eat for 24-48 hours. Hepatic lipidosis is less costly to treat and the prognosis is better the sooner treatment starts.

Your cat evolved to be a superb hunter. Along the way, her body adapted to a diet high in animal protein with a unique physiology and metabolism. Here are three things to remember when feeding your cat:

Choose a food formulated for cats to ensure that she will get all the essential amino acids she needs and enough protein.
Cats can digest carbohydrates that have been processed appropriately if they consume sufficient protein.
Make sure your cat eats every day. Seek veterinary care if she does not eat for 24-48 hours.

references

1. Danks, Lee. “The cat as a carnivore: proteins, carbohydrate and beyond” https://www.veterinary-practice.com/article/the-cat-as-a-carnivore-proteins-carbohydrates-and-beyond (viewed 4/29/23)

2. Schermerhorn, T. Front. Endocrinol., 03 December 2013, Sec. Clinical Diabetes,Volume 4 – 2013 | https://doi.org/10.3389/fendo.2013.00188

3. Laflamme, Dottie “Focus on Nutrition: Cats and Carbohydrates: Implications for Health and Disease”, Nutrition Compendium January 2010 (Vol 32, No 1). https://www.vetfolio.com/learn/article/focus-on-nutrition-cats-and-carbohydrates-implications-for-health-and-disease

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Reducing Your Cat’s Carbon Pawprint: Insect-based Foods

Posted on April 16, 2023April 19, 2023 by felinepurrspective_u3q4o6

Can insect-based cat food help you reduce your cat’s carbon pawprint?

Sustainability is a word you hear a lot these days, as more and more people compete for natural resources and deal with the effects of climate change. Sustainability is defined as “meeting the needs of the present without compromising the ability of future generations to meet their own needs” (United Nations Brundtland Commission 1987). So, you recycle plastics, take reusable bags to the grocery store, and limit the use of your car to reduce your “carbon footprint”.

How can you care for your cat sustainably? How can you go about reducing your cat’s carbon pawprint? In this post, we will talk about one of the recent trends in pet food aimed at sustainability: the use of insects as a food source (Reference 1)

reducing your cat’s carbon pawprint

Do Insect-based Foods Provide Sufficient Nutrition for Cats?

Our cats are obligate carnivores and are designed to eat primarily meat. Since many of our cats live indoors with us, they are not out hunting – we provide them meat-based cat food. Raising food animals (chickens, cattle, pigs…) for pet food produces significant amounts of greenhouse gases (carbon dioxide, methane, water vapor…) and so is not very sustainable.

Insect Nutrition

Meal made from insects has as much protein as animal meal.
Insects have amino acids that are very similar to those in animals and cats are able to digest these.
Insect larvae are a good source of energy due to their fat content.
Insects are rich in minerals and provide necessary dietary fiber.
Insects are more protein dense – per weight, it takes 3 times more chicken leg meat to provide the same protein as insect meal.
Insects make up 2% or more of a feral cat’s diet.

Reducing Your Cat’s Carbon Pawprint by Feeding Insect-based Foods

Insects require less water and land use than food animals.
There are lower greenhouse gas emissions when farming insects compared to food animals.
Mealworms and fly larvae convert 45-55% dietary protein into edible body mass compared to the 33% conversion rate of a chicken.
Insects can feed on fruit and vegetable by products, household waste, slaughter plant waste and convert this into edible food.

What Insects are Used for Pet Food?

There are three insects currently used in animal foods: black soldier fly larvae, mealworm larvae, and adult house crickets. Black soldier fly larvae are most commonly used in pet foods.

Are Insect Foods Safe for Our Pets?

The insect larvae are blanched, chilled or frozen, then dried and ground into meal. In the process, moisture is removed, reducing microorgansims and inactivating enzymes that cause spoilage. Heat treatment of the meal when making pelleted foods helps reduce bacteria and microorganisms.

Most insect bacteria and viruses usually do not affect animals and humans. However, insects can be vectors of some pathogens, parasites, and prions. Feeding the insects on vegetable waste (and not animal waste) makes insect food safer.

More studies aimed specifically at cats eating insect-based foods are needed.

Do I want my cat to eat bugs?

In Asia, Africa and South America, it is not uncommon to find insects on the menu. Chapulines or fried grasshoppers can also be found in restaurants in Mexico and even in California and Texas. However, insect consumption is not widespread in western countries.

Researchers from Oklahoma State University conducted a survey of 1,021 Americans in 2021 to see if they would be more willing to consume food containing powdered crickets than raw oysters (a food that although widely eaten is viewed as “yucky” by some). The findings: about one-third of Americans are willing to both try and consume insect products on a regular basis, provided they are tasty and safe to eat. (see Reference 2)

Another survey (Reference 3) in the United States that targeted dog owners found that participants:

were more likely themselves to try food made with insect flour than to eat the whole insects
were more willing to incorporate insect meal but not whole insects into their dogs’ diets.

Where Can I Buy Insect-based Cat Food?

A casual Internet search turned up a handful of companies marketing cat foods with insect protein. Most of these are based in Europe and Asia. The only cat food that I could easily purchase in the US is made by the Canadian company Catit. Catit offers dry cat food mixes of insect protein with chicken or herring called Catit Nuna. I contacted Catit regarding feeding trials with these foods. They responded that Catit Nuna is formulated by pet nutritionists and has undergone feeding trials per AAFCO protocols for acceptability, digestibility and palatability.

Insect-based cat foods certainly sound like they may offer some options in reducing your cat’s carbon pawprint. However, it looks like we will need to wait for more research and development before these foods become mainstream.

REFERENCES:

Valdes et al., Insects as Feed for Companion and Exotic Pets: A Current Trend. Animals 2022, 12, 1450. https://doi.org/10.3390/ani12111450
Melissa Reed, Bailey F. Norwood, W. Wyatt Hoback, Angel Riggs, A survey of willingness to consume insects and a measure of college student perceptions of insect consumption using Q methodology, Future Foods,Volume 4, 2021,100046,ISSN 2666-8335, https://doi.org/10.1016/j.fufo.2021.100046.
Jennifer E. Higa, Matthew B. Ruby, Paul Rozin, Americans’ acceptance of black soldier fly larvae as food for themselves, their dogs, and farmed animals, Food Quality and Preference,Volume 90,2021, 104119, ISSN 0950-3293, https://doi.org/10.1016/j.foodqual.2020.104119.

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