My old bitch is totally averse to being crated on her own. As a young adult when I was trying to insist that she go in on her own (after trying every method) I cruelly put a padlock on her crate. I left her a little while in the living room and was amazed to hear her scratching on the door. When I went in I was I found the padlock still intact on the crate. She must have pushed down one end and clambered through the gap!!!