A great site to stay up on nutrition information is www.DrdougKnueven.com. Recently he wrote

“Hills, Purina, and Iams are ingrained into the consciousnesses of every veterinarian from their professional infancy to their grave. Processed food is in our blood – Yuck. How can you expect a veterinarian to be open to the idea that real, raw food is anything but dangerous for pets?”

 Veterinary students learn about dog and cat nutrition from a book written by a major pet food company. The nutritionist that teaches them has usually had their education underwritten by a major pet food company. Major pet food companies provide free food for vet students and also the teaching hospitals where they are learning about veterinary norms.”

read more at http://drdougknueven.com/?p=300