I feed mine Royal Canin Natural Blend (which I was pleased to see was rated as human grade food on the site that Jordan posted). It is the best food ingredient-wise that I could find that I was able to buy locally. The review on it with ingredients etc is here if interested: http://www.greatgoldens.com/reviews/...oyalcanin1.htm .

I have been pretty pleased with it and was glad to get them away from a food that has corn or wheat in it.