I don't think mine sleep at all when we were out. She was crated when nobody is at home. Everytime when we are back she seem relieved and sleep took over. Like now, she was sleeping on the sofa beside me after my trip to the supermkt. Do they really WATCH when the owner is out of the house? She is only 4 mths old and yet she behave like a proper lady. Very different from the day we brought her home. It was like she is back to where she belongs, relax and contented. She was able to go to the cage everytime she need to do her business since yesterday :) (touch wood)