During the cold months, we will get mice in our garage (we get field mice). We put traps with peanut butter out -- the mice can't resist the peanut butter. There are also sonic critter chasers that plug in that annoy them and they won't want to venture into the garage - sometimes it works. If not, the traps get them!! There are also containers or blocks of bait that will kill them. By the way, I love mice - in a cage or in the woods.