Not to mention, they pee on everything. They chewed up my auto manual and peed over all the carpets in the car and they loved the peppermint oil, they even got used to moth balls in the car, I did too. Everyone knew I was coming, they could tell by the smell. They were trap wary until the new ones came out with the red bar that slams down after they put their nasty little noses into the compartment that holds the peanut butter. My cat has no interest in mice at all. He does, however kill chipmunks of various sizes. Go figure!?