Took Cricket on a couple errands, leaving the Z-Meister in the playroom again. I looked through the door before we left to see that the dog door was, indeed, closed. It was, although not quite all the way. It actually locks in place, and it wasn't locked. But I didn't mess with it. He couldn't possibly get out of it, right?
Instead, he shimmied the door up enough to get outside, but it slid back down after he was through the door, effectively locking himself outside in the 45 degree temperature. (I'm glad it wasn't raining) Fortunately, he stayed inside the fence today, and I will be putting him inside his crate, inside a closet, inside a locked room the next time I go anywhere.
Or, at least I'll make sure the doggie door is locked.