Actually sled dogs do it on the run as you can’t really stop a big team for every bathroom break. Some of my dogs have picked up on that but being a small team I stop for all them when I see they need to go. The genius of my design is I’ve incorporated spring loaded attachment points where the dogs hook to so if they sudden stop before I notice the spring absorbs some of the pressure and helps a little more gently stop them as it gives me time to react and stop the whole team!