Shark Teeth work on the principle of abstinence. If they can't touch it, climb it, bump it or lick it; they can't tear it up, knock it over, eat up your feed or waste it. Apply steel Shark Teeth to the feeder legs to create a barrier that deters critters. Line the inside of the feeder legs to keep Hogs from rubbing or bumping them. Line the outside of the legs to prevent Raccoons from climbing, and pigs and livestock from pushing and bumping your feeder.