No more dragging you!
Harm needs to walk on a leach if need be. I know that you live in the country and he spends most his time off leach but he needs to learn to walk on a leach and not drag you
Some situations (like travel, hotels) require a dog to be on a leach and you don't want to avoid them becasue Harm drags you
Have you ever considered a small sled for him to pull/train with in the winter?
After all that's what he was bred for and dogs are happy when doing what they are bred for, like Maddie hunting
I bet there is a sled dog club or organization close to you, check the Internet
Could be a fun social thing for you too!
Let Harm watch the Iditarod on TV, LOL
I agree. If you want your dog to be mannerly and well behaved you must be assertive enough show him the behavior that is expected and tolerate no less.
A perfect person to help is Hair of the Dog. I think she may train dogs. But having many dogs in my lifetime, first I ask is he neutered and then either way you must be the one in charge (usually getting in their face and saying NO in a rather aggressive stance will do that). There is no option and he WILL try to get away with what he thinks he can.
You will be well pleased when you are in control of the dog rather than vice versa. You will greatly appreciate being able to take the guy into public with proper manners.