My veterinarian sells all kinds of specialized food himself, but he told me that Purina was as good as anything since they spend so much on research. My cat eats Purina Kitten Chow as mentioned earlier. I have decided to switch my dogs to something new (we've been on Pedigree) to work with their shedding problems and try to shine their coats up a little. My brother feeds his two black labs something called Diamond that he buys at a pet food store. They are lean and their coats are just gorgeous. Right now we are using the grocery store version of IAMS, but I'm going to do some research before settling on something. Cost is an issue with two big dogs who eat a lot. Sorry to get off on dog food, but I know there are so many choices for dogs and cats and you can just get so much misleading information.