It's probably an especially good thing for gardeners to share information about how to deal with pests even outside the garden. Hopefully, pests stay outside of the house. Note to self: you're gonna have to decide to throw away some of those gluten-free flours sitting on kitchen shelves for months!
I haven't been sure about what to do with outdoor mice. About 20 years ago there came a late winter thaw and I found 2 dead cats under "stuff" in my backyard. Yuck! Why? I knew that they were my new neighbor's cats because I'd seen them over there, 2 doors down. I buried them quietly, thinking that he might jump to conclusions if he knew that they had ventured into my yard during their final hours. Why that had happened, I hadn't a clue.
A couple years later, I wondered if they had eaten poisoned mice. By that time, I couldn't remember if it might have been me setting out those odd boxes. Traps have been very inconsistent in catching mice and I have tried traps plenty of times, especially in years since the incident with the cats.
@seedcorn advised me some time ago that these mouse poisons are "metabolized" in the mice and not persistent - if I understood him correctly. I put out some bait this fall, behind boxes in the carport and in the garage. In the carport, I picked them up after about 3 days.
I don't hate the neighborhood cats and even enjoy seeing them around. The ones around this summer are still around.
Steve