I was still trying to decide on a name for my yorkie girl when I had almost decided on Houdini as she escaped her x-pen (24") after 2-1/2 days at 8-1/2 weeks old. When I got home she greeted me at the door. So I put up a 36" baby gate & voila...she got out of that one too. So I put her back in & watched & saw she was climbing up the bar & climbing over the top so I turned the gate around & she seems to stay in now. Not sure for how much longer though. By the way her name's not Houdini it's Maggie & she's now 13 weeks & I luv her to pieces!