For a horse that likes to set back....they get tied to a tree every day all day. If they want to stretch their necks I let them. I don't go running over or tie them in a special knot that when they pull back it comes undone. They will learn that pulling back gets them no where and I will NOT haul a horse that sets back....I don't want them destroying my trailer or getting lose and running around the grounds causing trouble or hurting somebody and their horse. So either they figure it out or they stand tied all day to a tree with many lessons to think about.
I don't tolerate a horse that sets back for no reason and who endangers me or others around....in fact I have a mare right now that is oh so close to getting staked to a tree.