Sorry, I had to tell you one more story about Harley and our doggie door.
The other day we were all outside, I came in to the get the phone and left the dogs on the patio. Harley decided to come in through the doggie door and Sydney (the schnauzer) did the usual. She sat at the door whining and waiting for someone to let her in. Harley went back to the doggie door and kept hitting it with his paw and barking. I swear I think he was trying to help Sydney and encourage her to come in. Wish I would have had my video camera ... it was too cute!