I once locked Dusty in a spare room just before I was leaving for the weekend! She must have snuck in behind me as I was turning to shut the door because I never saw her go in! Poor thing stuck in there with no litter, water or food for almost 2 days and it was summertime to boot so no fan either! When I came home and she wasn't there to greet me, I went looking for her. She was happy to be let out but hadn't been crying at the door when she heard me come home. She got extra canned food and seemed none the worse for wear but I felt horrible about it. Now I make a point of doing a head count before I leave the house!!