Personally, I am not an advocate for tranquilizing a horse unless it is an emergency.
Throw your clippers, turned on, into an empty platic bucket, and let him sit with the bucket until he realizes it isn't going to kill him. Then move the clippers to his body. He is okay with body clipping, so slowly move closer to his head inch by inch, only progressing when he is calm. I should add that you will have the clippers resing on him, not the actual blade parts, just so he hears it/feels the vibration. This way, if he moves, he won't get jabbed or get a funny hair cut.
Either that, or try smaller clippers for his face, like the Wahl face clippers that fit in the palm of your hand.
Last edited by RunSlideStop; 05-18-2012 at 02:02 PM.