We recently used the duct tape method, (with the cheap stuff) and it seemed to have worked to a degree. He hasn't limped since I hulled his corn. In our experience the tape has a tendency to come off, as they sweat through their paws, but it does soften the area up and the corn becomes obvious so it can be dug out gently. It did not lift off with the tape when it was removed. You cut a piece of tape the to just cover the corn, not the whole toe.