If they are mice, then try the liquid bait. Mice have very little water avoidance but a lot of food avoidance. Mice drink water daily. Rats once a week so this stuff works better for mice.I was using steel wool pushed into the holes, @ronott1. They just pushed it back out...determined little critters.
Even more disturbing is that they have stopped eating the One Bite bait I have in the bait holder.I moved the bait holder outside and set it where I've seen mice before. If I don't see it being worked in the morning, I'll try relocating it in the coop but that is such a pain as I have to put it somewhere in a chicken proof box. I have made them from chicken wire in the past without problems and may have to go that route again.
But I'm definitely going to have to change bait though.
This stuff: