The east side property line is a paradise for woodchucks -- which are called groundhogs here -- because it is defined by a line of about 50 mulberry and black cherry trees. There's also a barbed wire fence.
The 'hogs are smart enough to excavate connecting burrows on either side of the fence. This eliminates the use of smoke bombs because you need access to clog-up each hole. That's hard to do with a barbed wire fence. Those battery-powered noisemaking stakes don't work either. Instead of being driven away by the noise, the 'hogs attack and destroy them. The best solution the past 32 years has been a 12 gauge shotgun, but 'hogs ain't easy to hunt. They are wary, and enjoy excellent eyesight, hearing, and olfaction.
Had a guest who suffered a sprained ankle by inadvertently stepping into a hole. On another occasion a tractor wheel got stuck and it was hell trying to free it. Last year a 'hog ignored the vacant burrows along the east side and started a new one under the house foundation. But the worst problem are the piles of dirt and rocks outside the burrows. You have two options on mowing day: rake the debris back into the hole, or carefully mow around the piles. The second option is better because if you continually rake the debris back into the hole, the 'hog gets pissed-off and starts a new hole. Don't need any new burrows.
On the bright side, I wounded one today, looked like a big alpha male. A wound is as good as an outright kill because the infection will finish him shortly. But the news spread fast. Not a half hour later, a smaller one scampered along the row apparently to claim the more desirable burrow where the big guy lived and which features both a white and black mulberry tree within a few feet of it.