Hanna does this too. We sit outside at night with the dogs, and every time I come back in she is sitting (hiding) by the door. She hasn't been sucessful getting out yet, and if she does she would be faced with our 6' dog fence, but I still want to avoid it. There are places where she could scoot under the fence. This is my biggest nightmare, so I watch her like a hawk. I ma thinking about leash-training her, but I'm afraid it would make her want to go out even more. And she's really fast.