Yeah don't know how much time you have spent with any kind of working dogs but getting them to stop before they hurt themselves is one of the hardest things for you as the person working them to do because the dogs will never willingly stop by themselves. Hunting dogs die every year running themselves into a heat stroke and you have no idea they are even struggling until they just drop because the dog gives absolutely no indication it's even tired and just keeps running, even when you aren't asking them to. When working them you are constantly having to ask them to slow down rather than pushing them to work harder.

Working dogs willingly push themselves to the absolute extemes constantly. The human is mainly there to make sure they don't push too hard, not the other way around. These sled dogs dont need to be forced to pull until they keel over. They need to be watched to make sure that they dont