Prison Break Beagle Style

Boy have we ever got Mom stumped. Now that it is cold and wet outside she puts us in the crate in the morning before she leaves for work. On Thursday we were locked into the crate as usual. But when Mom came home at the end of her day she could hear us barking right on the other side of the front door. She opened the door and there we were to greet her, with the door to our crate standing wide open. She cannot figure out how we got out of the crate. She is positive she locked it. She keeps asking us how we got out, but we're not tellin'!