Haven't had any mice venture indoors in a long time (it would take an exceptionally brave or stupid mouse to do so), but there were a couple of occasions back in the days when there were only two cats in residence when I came home to find Kacey trying to stick his head into one of my boots. Each time, I found a terrified mouse cowering in the toe of the boot. Took boot outside, set mouse free.

What I always have wondered is whether Kacey picked up the mouse and dropped it in the boot, or whether he somehow managed to herd the mouse in there. As to why, well . . .