If its done properly & safely & the dog is TRAINED (if ur using a car & on the road), there is no problem with it.

My ex-friend & myself us to run her 200 pound Rotti tied to the back of the 4-wheeler. At this time the dog was not trained at all & was a dog killer. He was over powering both of us no matter what we did (there were no such things as a prong collar at this time in our town/area.

We had a retractable leash that I held. Her property was large enough to drive on & there was a little hill too which was fun. I would sit facing backwards & she would drive the 4-wheeler. Since we weren't going fast we could hear eachother talk with no problem, so if I said faster he bitting the 4-wheeler again then we would go just fast enough to keep a distance & he he stopped all of a sudden the leash gave us 30 feet to hit the breaks.

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Before Ceazar a guard Rotti was trained to walk on a leash, his owner would chain him to the car rear bumper & his kids would sit in the trunk of the car making all was well. They ran/walked him on abandoned roads in the middle of nowhere & if a car did go on that road u could see & hear them coming miles away.

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I use to run RB Max on my bike in the neighbourhood & in the bush. He was never tied up to my bike & he was trained to only walk in sidewalks & not roads so I never had a problem & he was trained to stop & sit at corners until I approved all was well. & in the bush he just had to stay away from me, which he picked up quickly & would stay ahead about 30 feet. he understood left & right so I only had to LEFT or RIGHT to make sure he went down the right path.

Also rollerblading with RB Max was fun. I cannot rollerblade on my own, I need a stop & go, I can turn on my own. Max also understood RUN (faster) & SLOW (slower duh) & STOP (which ment walk infront of me & make me stop with his harness!!!)..

Those were the good days