I think the prevention method is probably the best method. My dogs were never hunted off any ATV (mainly cause I dont have one lol) but as I started hunting with more people who do use ATV's my dogs dont pay them any mind. I might try only hunting the dog when you can go without using your ATV for a season and that might get it used to hunting without constantly listening for an engine. Old habits are hard to break and a few hunts might not do the trick. If not we can always use a good strike dog.