I feed ProPlan. But what works for one dog may not work for another. It may be a trial & error thing. But if you feed a good quality food & your dog does well....then that is what is best for your dog.
We feed Flint River Ranch Fish and Chips (trout and sweet potato). All natural from only human grade ingredients and twice baked. They make other varieties as well. We order online and get it shipped direct from baker via UPS. All our dogs perk up whenever they see the brown truck. It is very good quality stuff we pay just over $60 a month for three dogs. (2 big and one small) PM me if interested and I can refer you to a site to order. You can order samples as well.