Your best bet is to keep desensitizing him to it. just incorporate "visits" with the halter every time you work with him. Praise every little thing that he responds positively to. Try rubbing it all over his body and see how he reacts, keep your sessions to one main section of his body, start on his back, then go down to his legs etc.. Spend a lot of time around his neck with the halter. Rub, praise, rub, praise etc... Eventually try it on his head, just rub don't tie it up. Eventually work by bringing it up on his nose again don't tie it just leave it there until he is fully relaxed. Eventually tie it loosely and proceed to tying it tight. If he reacts spookily to anywhere on his body repeat that same spot until he's relaxed.
Last edited by palominolover; 06-28-2012 at 08:48 PM.