How about a wild pig - we are plagued with the things here, usually in the late winter / early spring, when they roto-tiller our lawns like you wouldn't believe. Just 2 days ago my son came to feed animals for me, and found a pig rooting around my chicken run . Fortunately we put an electric wire around the base of the fence, which I'm pretty sure is what kept him out. We also spread an apron of fence wire out away from the fence, covered it with gravel - which would have kept out a normal digging animal. But Mr. Piggy managed to root up some of the wire too. Mr Macho Man, my son, was able to think quickly and sent Piggy to pig heaven before he could do any more damage. I love electric fence! It's not very expensive for the wire and a small charger, and seems to have saved my girls!