We had a bunch get into our attic one winter. They chewed a hole in the ceiling right over the dining room table. Hubby finally got them dispatched, and found where they got in and blocked it up.
BTW, when making purchasing decisions on air guns, go with the CO2 cartridge type. The Rugger I have makes way too much noise. It sounds like a gun. I live urban and I prefer to be subtle if ya know.......