just google Canidae's website and read all ingredients are human grade. really too much info to post.
I searched foods with no Ethoxyquin. after feeding the Vet's "recommended" brand (which only vets could sell, DUH) for years and losing fairly young dog to liver cancer. The thing about ethoxyquin is (IMO, and I don't want to argue with anyone), animals are fine until suddenly they are dying.
There are other good ethoxyquin-free foods, but my dogs had gas/stool problems. Not bearable for indoor pets.
Canidae even passed the "Boxer test" for the ones I've had. that breed is notarious for getting killer gas.... I mean the kind that knocks you over gasping for breath. LOL.