What is the best dog food I can find at the supermarket?

I have a 7 month old boxer and am about to change his food from puppy food to dog food. I’m interested in finding out what the best SUPERMARKET dog food is. P.S. I said supermarket dog food, not some super organic food that just so happens to be for dogs, created by long haired organic hippies in California.
THANKS: Dry dog food is the only option.