Both of my Scotties love the sidecar. My Great Dane is interested, but at 200 lb, he will not fit. I have a seatbelt fitted to use with dogs, children, or cargo. With a harness and leash on the dog, I pass the hand loop of the leash halfway under the brisket strap on the leash and fold in back on itself. I then pass the seatbelt through this loop to secure the dog. With a little slack in the belt, the dog can move forward off the seat to get out of the wind at speeds of 45 or higher, but at lower speeds, she stays on the seat with one foot on the armrest to look around. She can't get her chest over the armrest, so there is no danger of her trying to jump out. A few minutes in the sidecar and a few trips up and down the driveway and they are ready to hit the road and see what they can see. Both of my small dogs quickly got the idea and get very excited if I get out the harness and leash. They know what it means. GA-DK