Below is a great website that analyzes dog foods and rate them on ingredients. Contrary to popular belief, name brands are typically the worst foods out there from an ingredient standpoint. Purina Pro Plan is a 1 star food according to this website. Many of the 6 star ultra premium foods are all natural and very expensive. I go with Canidae for my dog. My local co-op carries it and its quality kibble for a reasonable price. Check out this website below for more information.

http://www.dogfoodanalysis.com/dog_food_reviews/