After several weeks of trying to catch a squirrel in a baited trap in our attic without success, we installed a Pest A Cator Plus in an outlet near his nest in the wall. For the first time, the squirrel avoided the nest at night and ended up being caught in the trip the first night we had the Pest A Cator plugged in! Evidently, the Pest A Cator was enough to keep the normally diaurnal squirrel awake and disturbed at night away from his nest! We're going to buy a second one and keep them plugged in 24/7 to keep anything else from coming in.