Okay so I have solved almost all of my predator problems except for the neighbors rat terrier. I was wondering if something like this or something similar would help to deter her from digging under or pushing on my chicken wire? http://www.walmart.com/ip/36-Decorative-Outdoor-Picket-Fence-White/10745806 I would put it outside of the pen up against my chicken wire. I DO NOT WANT TO SHOOT THE DOG just keep her from trying to get in. I can not put up an electric fence because it is my grandparents property and they said no electric fences because of their other younger grandkids.