I have seen from my next-door neighbor how raising chickens and cows together are a perfect match. The chickens learn to stay away from the cows so they don't get trampled, but they pick through the feed that the cows drop, eating what would otherwise get wasted. Chickens will even pick through the cow manure looking for fly larvae, supplementing their diet with extra protein. With enough chickens, your fly problem will be reduced significantly. However, they can't dig deep through the…