Short story long, I'm going after a bunch of groundhogs that have been doing damage in a barn I use for storage of hay and hay equipment. I put small square bales on top of pallets to keep them off the ground so they don't rot. Groundhogs then moved in to excavate a huge tunnel network under the pallets and in doing so pushed all the dirt up into the pallet so hay bales now in contact with soil below.......and are going moldy anyway. Pulled about 40 bad bales out a couple months back. So those guys gotta go.
We cleaned out the barn, got all the tunnels filled in, level, put pallets down, then proceeded to stack in 250 bales. A month later and pigs are back. In this corner of an 80 x 50 pole barn, under a section 8 x 20, I found at least 6 tunnel openings. Two outside, the rest inside. Coming and going from 3 sides and game camera showed which were active. Set 6 body grips at openings, and quickly caught 2.......with maybe 2 Einstein Mensa level pigs left. They have quit using the openings. They may be sill coming and going, just not sure where. On other end of the barn is another tunnel system. Two openings outside, one inside. At least those are the one's I can find. Filled in the outside openings...........and those opened back up, so are in use. Except when I then set traps, they stop using them. They are still around, as they show up on game cameras. One is a jumbo big'n.........the other this year's juvi.
In place of a cage trap (mine are drop gates with no nose cone, so can't use those to block openings. Instead I have a body grip box........which allows butting against back wall and covered opening.......kinda like using a cage, except with body grip. No joy. They refuse to go thru it.
![[Linked Image]](https://trapperman.com/forum/attachments/usergals/2026/06/full-51773-295970-img_2368.jpg)
I cover the bottom ply with dirt or hay, still no joy. And that was with an active hole they dug open and I watched them use. These boys are smart.
So for now, have replaced that box with a 1.5 coil spring............and a 160 set in hole dug in opening. Those been active 2 days now.
![[Linked Image]](https://trapperman.com/forum/attachments/usergals/2026/06/full-51773-295972-img_2366.jpg)
The board on top and other blocking is to limit access from outside. Anything coming out of tunnel is going to have to get past that 160.
But I still see them in the barn, where I have 3 baited cages set. They sniff em, but don't go in. My hoped for miracle bait was going to be some Dobbins
Backbreaker.........and yes one did spend a lot of time sniffing........from outside. Never cared enough to in in the cage to get a good whiff point blank.
These boys are smarter than they look.