Lots of good posts so far, and I think both sides of the situation have been touched on.
NO farrier is going to be okay with the horse yanking and pulling on him, or trying to put the foot down before he's done working.
If you no longer like or trust this guy, well, then you need to make a change. But the issues that created this problem won't go away - you'll need to address them with the next farrier.
Most farriers greatly prefer that the owner discipline the horse, and will only take it upon themselves if the owner is unobservant or unwilling. Since the farrier is working under the horse, and asking for a high degree of submission, he needs to be the "good guy." He should NOT be the disciplinarian.
Here's some things you can do to improve both the working relationship with the farrier and improve the results:
Discuss with the farrier beforehand what you think the horse's behavior problems are; and *ask how he would like you to react and/or handle them* Ask the farrier to educate you a little about how to stand and position yourself and the horse to make things easier for him. Continue the conversation while the farrier is working. You'll learn tons, and your horse will benefit.
Do a few simple things to make your horse more comfortable with being handled for the farrier. Make sure he's turned out or had exercis ebefore the farrier comes so he's not tense or stiff. If your horse has any arthritic issues, give him a gram of bute the evening or morning before the farrier visit - this alone cures many "behavior" problems that have physical causes. Do work with your horse *every* day about having his feet handled and do not tolerate him leaning on you or snatching his foot away.
From your post, it seems like the farrier was trimming the horse, not shoeing. IF the farrier was shoeing, and had driven the nail but not clinched it, that's an incredibly dangerous situation for the farrier, the horse and you. If the horse yanks away with the nail unclinched, he can rip the farrier's hand open, rip his opposite leg open - the farrier has a choice between those options, or having his back and knees wrenched and pummelled.
Last edited by maura; 06-23-2011 at 08:09 PM.