Mine trains really easy. I didn't even have to try to train him on eating stuff he is not suppose to and puking in my floor. He got that one all on his own.
Mine eats, let me see....
Frogs, snakes, salamanders, dirt, grass, leaves, roots, bugs, beetles, a bee (once), ants, gnats, rocks, weeds, dead things the cats bring him, snails, slugs.... *catches breath* ....worms, his own fur when he sheds, chicken feed, corn, cat food, anything people drop, anything I say "no, drop it" about, and anything he takes a mind to swallow.