My vet was a neat fellow who had field trial labs. He also sold the Science Diet and Ekunuba [sp?] brands. His dogs were fed Nutra Nuggest sold in Costco. It is made by Diamond. He said the food was about the same as he sold, but each sack he used he saved about $10. I've followed his advice for years and had fine results.

http://www.bakercollectors.com/