We have always owned Collies, but at one point we had the best Labrador in the world. He passed away several years ago and I still miss him greatly. He was a tremendous duck dog. My wife acquired a couple sled dog harnesses from somewhere and she always used the dogs to mush to the mailbox about a mile away. She always got weird looks with her full-size dogsled and team of Border Collie and Lab! The Border Collie was always smart and she quickly figured out that if she just kept the rope tight, she could appear to be pulling but it was always obvious that Brant was maintaining all forward momentum! He would sure pull. Now our old collie is 13 and her only duty is to try not to get herself killed around the equipment. She is deaf as a post and I now have to be very aware of where she is when I am moving equipment or vehicles around the yard. Our new Collie "Tag" is almost 2 now and Cindy decided to try him out in the harness yesterday. It was amazing how quickly he learned to pull. Obviously, he can't pull any amount of weight, but it is still fun for Mrs. Schneider to go to the mail.