None other than what you already said. I'd try to fence it off, that's the easiest way, and it will allow the grass to grow there. We had to do that with Chester, too. We had a mole and he wouldn't leave the spot alone. We finally went to Home Depot and bought a small bale of inexpensive chicken wire and fenced it off with that for a couple of months. We've since used that entire roll of wire for several other places we just didn’t want him in for one reason or another. That was 4 years ago and we’re on our 4-5 roll now! Very handy stuff!