Tucker is my under the cover sleeper. If he gets too hot he will jump out but he also somehow gets back in during the night without my help (although I think I may raise the covers in my sleep. We have all kinds of different posititions as he sleeps slapped right up against me....spooning...his legs in my back...back to back. Of all the dogs I have had, he is my first under the cover sleeper and I just love it.