Answer:
You have a Snorkie!
If your dog is anything like our miniature Schnauzer mix (he's a rescue dog, and we don't know what the other part is), he/she is probably a good escape artist. After ours had lived with us for a couple days and defied his puppy gate and all the other barricades we put up to keep him in the kitchen at night, we said in restrospect we should have named him Houdini!