Dog door.

Dog door, I am not quite sure why we have one other then it came with the house and you would have to get a new door in general which I wouldn't mind, but we are finding out that it is a great for keeping Caitty and Shadow busy.

Caitty has also learned how to pull off the thing that blocks the dog door to keep the dog and wind out so now she can escape when ever she feels like it.

One of her preschool teachers husband had parked in the parking lot by the house and was just having a good-ol laugh at Caitty as she kept going in and out of the dog door. He thought that it was very inventive.