On my father in laws property here in soviet NJ he is having quite a problem with ground hogs. The problem is that you can only get about 150 yds from them and the spook into their holes. Now we cannot use any kind of rifle. and muzzle loaders are limited to .36 and below. I have lobbed .20 ga slugs with very little success. Is there any thing you guys can think of besides "anti-freeze" on corn that can help me get rid of them.