That is totally wonderful! That sweet little dog probably never knew he had a problem, but now he can be a little more like the other doggies he sees. Just have to love it! What a clever, and simple looking invention!
That is a happy ending! My SIL's boxer ran out the door one Christmas morning at the other SIL's house. We all watched in horror as she dashed into the street and ran INTO an car. She bounced off the passenger door, and seemed completely unphased!