Groundhogs are not predators but their holes provide a refuge for predators to hide out. If I find any hole close to my buildings I dump dog crap in the hole. It's not a fool proof solution but it works most of the time. It has the added benifit of giving me a way to dispose of dog waste. I have close to thirty dogs so that is a big plus. You would be surprised how much dog waste can go down a groundhog hole. If the chucks stay in the woods away from buildings and hillsides I give them a free pass but if their digging can cause problems I deal with them.