By Dr. Jean Hofve
After our look last time at vegetarianism in pets, this time we’re going to
the other extreme—the high-protein, low-carb, so-called “Catkins” diet (a little
wordplay on the low-carb Atkins diet for people). This is a far more prevalent
trend in pet diets, and one that I’m glad to see—with a few reservations!
Looking at wild carnivores, it’s clear that what they mostly eat is other
animals. Large canids like wolves, and often coyotes, hunt in packs and can dine
on big game animals like deer, elk, or moose, while foxes scale it down. All big
cats but lions are solitary hunters, and their prey are also proportional in
size, although even a domestic cat is quite capable of bringing home an adult
The carnivore’s diet has a few things in common across the spectrum of possible
prey, which represents a sort of “ideal” we should be shooting for in feeding
• High protein (50% or more)
• High moisture (60-75%)
• High fat (30-40%)
• Low carbohydrate (less than 10%)
A rat, for instance, has about 55% protein, 38% fat, 9% carbohydrate, and 64%
moisture (calculated on a dry matter basis). The “dry matter basis” is the only
valid comparison of pet foods, particularly between dry and canned foods. The
water is calculated out by subtracting the moisture percentage on the label from
100%, leaving total dry matter. Then you divide the ingredient of interest, for
instance protein, by the total dry matter.
This sounds complicated, but if even a math moron like me can do it, you can
too! (Hint: your cell phone probably has a built-in calculator!) It’s essential
to master this concept in order to accurately compare pet foods. For example, a
dry food containing 30% protein and 10% moisture contains 30/90 or 33% protein,
while a canned food containing 10% protein and 78% water actually contains 45%
protein. So even though the canned food label claims a lot less protein, it
really contains much more than dry food.
Many canned foods, especially kitten and cat foods but also many dog foods,
already fit our “high-protein” qualification and also contain 10% or less
carbohydrates. (You can get a ballpark estimate of carbs by subtracting the
other labeled ingredients, including moisture, protein, and fat, from 100%.)
Low Carb Canned Dog Foods
Low Carb Canned Cat Foods
There are quite a few “low-carb” or “grain-free” dry pet foods as well. Remember
that “grain free” does not necessarily equal “low carb.” In most grain-free dry
foods, cereal grains like corn and rice have been replaced by white potatoes,
green peas, carrots, or other starchy vegetables, or by dairy products such as
Now, there’s no doubt that grains are problematic for dogs and cats; corn-based
dry foods in particular are much to blame for the current pet obesity epidemic.
Getting away from grain-based foods is a great choice for many pets. It’s been
proven many times over that the best and safest way to help a cat lose weight in
by putting them on an all-wet, low-carb “Catkins” diet (which could be canned,
raw, or homemade). Studies show that dogs lose fat and maintain lean muscle
better on the same type of “Catkins” diet, but “Dogkins” just isn’t a very
However, you still have to read labels and assess ingredients to make sure
you’re getting just what you want in a pet food. Shoot for around 45% protein in
a dry cat food, and at least 35% in a dry dog food (on a dry matter basis).
Be aware that high protein dry foods tend to be higher in fat as well, and
should not be fed free choice (available 24/7). It is definitely best to feed
these foods in timed meals, and make sure you do a gradual transition from the
current diet (see previous posts on Switching Foods) to minimize tummy upset.
Unlimited consumption of these foods will often result in weight gain, so don’t
overfeed! Many of these foods now come in a “reduced calorie” formula, but it’s
a lot easier to prevent weight gain in the first place!
High protein dry cat foods are also very dehydrating, and ideally should not be
the sole diet. Do feed your cat at least 50% canned food for that important
kidney-protecting moisture. While dogs will drink more to make up for the
dehydrating effects of these diets, cats will not.
Several manufacturers have also come out with “100% meat” canned diets. Most
(but not all) of them are not balanced with minerals and vitamins, and are
intended for occasional use only—not as a sole diet for your pet. They are
suitable as a basis for a homemade diet.
Here are just a few examples of the many excellent low-carb products you can
Only Natural Pet Store:
Wellness CORE Grain-Free Feline Diet
Innova EVO Dry Cat Food
Wellness CORE Original Grain-Free Canine Diet
"I and love and you" Nude Food Dry Dog Food
Frozen Raw and
Non-Frozen Raw meat-based diets are usually high in protein and moisture, and low in
carbs. Many cats and dogs do very well on these diets, but if you want to try
raw food, make the switch slowly, and be very cautious if your pet has
pre-existing medical conditions affecting the digestive tract and discuss it
with your vet first.
When used correctly, low-carb diets work extremely well for weight loss in
both dogs and cats. They help maintain healthy skin and coat, vibrant energy,
and are far more appropriate for carnivores than mass-market pet foods that are
loaded with corn and soy. There's less yard and litterbox clean-up, too, because
more of the food is digested and assimilated. At Only Natural Pet Store, we
carry a wide variety of great-quality natural pet foods, but grain-free, low-carb
and raw foods are among the most premier of products and will benefit your pet's
health in many ways!
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