Feed them dogfood. Yet on inspection, most dogfood bags list ingredients like chicken byproducts and internal organs. The internal organs of chickens and cows are by far the best source of nutrition for animals - much more so than the tender breasts and tenderloins we so value.
Nothing beats a good chicken liver or cow's heart for nutrition.
In many other cultures, these are the most highly prized parts of an animal. Western culture has spurned their use in favor of the less messy and intellectually cleaner steaks and the like. It's good for you. Too bad most of us consider it gross. There's nothing inherently wrong with feeding your dog bacon.