I put my game cam in the run, pointing at the coop door, to see if anything came through. When I checked the pics yesterday, I saw that a coon and a possum had gone in the night before. (That explains why so much feed is gone lately).

I set the trap just inside the coop last night, so that anything trying to go in would walk into the trap. It worked, and I'll be giving him a .22lr later today.