Interesting. Our new vet says cats crave and need fat in their diet. Possibly dumb question: Are fats in the carbs category? I told him that Edna (age 17) has eaten nothing but kibble and dry treats her entire life and we got her at 5 weeks. We've tried her with different kinds of canned food and people food and no go. She's been 12 lbs for many years. She drinks water regularly so no problem there. Full exam and blood work (the first in her life) last year showed old cat liver numbers, but otherwise fine. I have never checked the carb count on her food, which is a premium brand. She still plays like a kitten (in between naps) so maybe she knows what she likes and is sticking to it?