Originally Posted by TheBayArab
My three year old colt (turning four soon, already gelded) has a biting problem. It is definitely a playful thing, and so far my strategy is to keep him from doing it in the first place and if he does to to smack him with the lead rope (not too hard, don't worry, it just startles him). I am just wondering if there is any way to speed up the process? I want a horse I can turn my back on without being bit.
There is the problem - it SHOULD be hard, it SHOULD hurt and it SHOULD do more than "just startle" him.
As deserthorsewoman said, you are the *lead mare* and if this colt were to nip/bite the lead mare, playfully or otherwise, she would deal out swift and firm discipline that would make him not want to ever do it again. Right now your response is nothing more than pecking/nagging at him and making a games of it - you are, in essence, nipping him back....which just serves to continue the game and gives him the impression that you are playing along and okay with the behavior.
Biting you (or any human) needs to become the BIGGEST mistake he ever makes and one that he NEVER wants to make again.