I've never done it, but...my kids used to go to school in Park City. My son's class was tracking the Iditarod race one winter. During that unit the teacher, who had connections with the dog sledding in Park City, invited one of the operators to bring in a team of dogs to show the class what the dogs are like, what they do, ... I happened to be there that day, so I got to see some very happy and energetic dogs. Those dogs are bred for work and using energy. Every 15 minutes one of the dog sled people would take the dogs out for a few laps around the school. I personally think that dogs like that are bred to pull and run. The dogs I saw seemed very happy. I don't know which operation they were with, though. There can't be many. Check Yelp. I would have no issues with it being inhumane....at least for these Park City dogs.