Hogs love to rub their hides in oil or grease of any sort. Take a piece of chain and wire it tightly between two trees. Cover it with burlap and then use tie wire to secure the burlap to the chain. Drench the burlap in burnt motor oil (be careful with the enviornment, of course, put it ONLY on the burlap). You will find hogs passing up your corn feeder to get to this artificial 'rubbing post'.It's anohter trick that will help concentrate hogs.I've noted that when traveling "new" hogs come through, they often stick around because of attractants such as this. Good hunting to all of you. LukeClayton