Our cats Coco and Layla have abandoned sleeping in the bedroom at night. Instead they patrol the sliding glass doors that go to the backyard. They've lead sheltered mostly indoor lives. Since the weather got warm, they spend much time waiting for (wild) neighborhood cats who visit. Upon sighting them--Coco's been known to throw a hissy fit, ruffling the curtains and generally getting very bent out of shape. Layla remains calm but she's rapt with attention. They never miss a visit.