Only Purina Kitten Chow has any quality at all. All the rest of Purina cat foods are loaded with cheap grain fillers. Even the Premium brands contain, if not useless grains, then useless vegetables like beets, potatoes etc. Cats cannot use these foods effectively as they obligate carnivores. Buy the best canned food you can afford for your cats. See
www.catinfo.org
Many Veternarians are aware of the problems kibble is causing cats, but if they have their patients switch to canned, they stand to lose a lot of money when the economy is already slow. It's a conflict of interest for them. In fact on one Forum the the Mod, who is a Lic vet himself, will remove almost every post on proper cat nutrition.