While most dogs will live ok on the common, inexpensive, supermarket dog foods, check out the ingredients. The first three are most important....and the true definitions of such per the national guidelines. By-products, corn, grains, and various other [censored] IS NOT what I want my best friend to eat. I figure a dog is similar to a wolf in it's nutrition requirements (loosely). I try and imagine what a wild canine, eating an optimally available diet, would consume on a weekly basis. Birds, small game, occasionally larger game, small amounts of fish, berries, (yes, I've seen canines eat berries), eggs, and basically anything else that is crawling upon the earth. I've never seen nor heard of roaming bands of wolves or coyotes invading corn fields or wheat graineries for food. Not a natural, healthy food source for canines. In my humble opinion, make sure the first three or even four ingredients are healthy, nutritionally measurable meat sources.