The protein that's in dry food is very frequently plant-based.  

Plant based proteins have a much lower biological value to obligate carnivores than meat proteins.  

For pet food manufacturers, obviously, plant proteins cost a whole lot less.  Corn, soy, rice, and wheat are much less expensive to source than meat.  

So when you're reading the label on a cat food, it's important not only to notice the percentage of protein, but to know the source of that protein.  The notion that the formulators of pet food have the wisdom to make up for what may be missing by using so many species-inappropriate ingredients in cat food is, 

Quoting Dr. Lisa Pierson of CatInfo.org:  

Veterinary nutritionists and pet food company representatives will argue that they are smart enough to know *exactly* what is missing from a plant in terms of nutrient forms and amounts - nutrients that would otherwise be in a meat-based diet.  They will then claim that these missing elements are added to their diets to make it complete and balanced to sustain life in an obligate carnivore.

The problem with this way of thinking is that Man is simply not that smart and has made fatal errors in the past when trying to guess how to compensate for such a drastic deviation from nature.  Not all that long ago (1980s) cats were going blind and dying from heart problems due to Man's arrogance.  It was discovered in the late 1980s that cats are exquisitely sensitive to taurine deficiency and our cats were paying dearly for Man straying so far from nature in order to increase the profit margin of the pet food manufacturers. 

There are several situations that can lead to a diet being deficient in taurine but one of them is using a diet that relies heavily on plants (grains, etc.) as its source of protein.  Instead of lowering their profit margin and going back to nature by adding more meat to the diets, the pet food companies simple started supplementing their diets with synthetic taurine.


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Cats are different.

Plant based proteins lack all the individual building blocks of the amino acid profile required by carnivores. For example, we know Taurine is a key amino acid nutrient for cats - and it simply doesn't exist in plant matter. 

Humans can take the different pieces of the protein puzzle from plants get what's required to live. 

Dry food (kibble) is almost invariably based on plant proteins - so while the AMOUNT of protein listed on the label might look plenty high, most of it is not biologically AVAILABLE to a carnivore.




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1. The moisture in canned or home-prepared food is absolutely vital to your cat's urinary tract health

2. Most dry foods rely on grain-based proteins that have low biological value for obligate carnivores (cats)

3. The carbohydrates in dry food are high and harm a cat's blood sugar and insulin balance

4. Many dry foods contain ingredients that are allergenic to cats  

5. Many dry foods contain soy ingredients that can harm a cat's thyroid gland 



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All cat food contains protein, but not all cat food has protein that's scores high in providing biological value to the cat.

The protein from dry food is frequently heavily based on plant matter. Plant proteins are less expensive for manufacturers than meat proteins, so using sources like corn, rice, wheat and soy is an easy way for pet food companies to improve their profit margins. 

But what's good for their profit margins and shareholders isn't necessarily good for your cat. Remember to burrow into the source of protein in your cat's food to make an educated and informed choice that favors your cat's health. 


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