This shows your ignorance in what happens on the LONG trail ride. It's a race, so the mushers generally don't get any sleep and so yeah, they sleep as they ride, as much catnapping as you can do while moving 20 mph on a treacherous trail in the middle of an Alaskan winter. The dogs do die on the trail, it happens and that is sad, but it's a part of life up here. Lots of death, nothing to feel bad about.