1/2 the expensive, top grade dry food, 1/2 raw beef (recommended against by 1 vet but never saw any problems) or cooked chicken. Often chicken broth from boiling the chicken bones poured over the dry food. Went through phases of grinding up veggies to mix in with his ground beef (wouldn't eat them otherwise) but that was on again/off again. Nice steak or lamb on special occasions.
Had to cut out big beef marrow bones around age 10, seemed to be too much for his stomach to handle. Sure enjoyed plenty when he was young tho.