My vet says there's nothing wrong with grains, even corn. "Natural" means nothing. My vet spoke at the library one evening about feeding our pets. Three people showed up. I felt sorry for him, after a long day at work.

I have seen very few persons, owners, breeders, and Vets, that can actually read and understand the ingredients list on dog food. And I've never met a raw feeder that could tell me the important as-fed ratios of such things as Ca-Ph, etc, in their dog's diet.