If you're afraid of upsetting the neighbors with the noise of a gun, a homemade snare or store bought spring trap can be mighty effective... as long as there aren't wandering pet cats in the neighborhood <img src="/ubbthreads/images/graemlins/laugh.gif" alt="" />

Heck, even a live catch trap and a quiet relocation of the critter in question can be a good workaround.