Inside a dog food processing plant?

My dog catches moles and mice, kills them, then eats them. He eats birds my cat catches and drops behind. He eats cat poo from the litter box. He eats scraps from the ground, he eats sticks and grass and bones. I'm not concerned about how dog food is processed. I am concerned about that mole that might have gotten into some poison though. We have to watch him ALL the time!