Free: Contests & Raffles.
I feed my lab puppy Nutra Nugget- The puppy version. I have had a couple different vets along with my breeder tell me its good stuff. I haven't had any issues with it. My dog seems to like it and she stays fairly regular. Price wise its not bad. Its about $31 a bag. However it is a 40lb bag compared to most of the other more expensive brands that are 30lb bags.
My brother in law worked at a research company that did studies on dog foods. He said that out of the reasonably priced grocery store foods that Beneful was by far the best food out there. That is what I have been feeding my lab since she was a pup. It is not the cheapest nor the most expensive.....