I was wondering: I have a rather large cage in my room (for the dog, honest) and was wondering...is it possible to really sleep in one comfortably? I've tried a few times, but after about 1-2 hours I just have to get out and stretch. I really enjoy being in the cage (it feels very safe and secure, plus I do love small enclosed spaces) and would like to sleep in it occasionally, but so far I've been quite unsuccessful. Any advice?