Cats are obligate (strict) carnivores and are very different from dogs in their nutritional needs... It is very important to remember that not all proteins are created equal. The protein in dry food, which is heavily plant-based, is not equal in quality to the protein in canned food, which is meat-based. The protein in dry food is, therefore, less bioavailable to your cat.Lisa A. Pierson, DVM. "Feeding Your Cat: Know the Basics of Feline Nutrition."