If there is a Costco near you check out the costco brand dog food (Kirklands signature I believe). It's really reasonable and the ingredients are much better that other less expensive dog foods.

What I first look for is that meat is the first ingredient and there are no bi-products or corn in the food.

I feed Nebo Natural Balance but it's quite expensive. My mom has been feeding Reggie and Syd the costco brand and they are doing well on it.