I have tried a sharp no! And taking whatever is in his mouth away from him, but its too much like a game to him. I don't want to do anything to make him headshy, he is almost 18 HH. I do not hand feed him either.
His teeth are great, we havent changed tack (except we got a saddle that fits instead of being too narrow). I generally put him in a flash when we ride, but it is super loose (2 fingers) and he will even try to get that in his mouth. I thought about putting no chew on my rope reins and let him figure it out for himself. Any suggestions?