Fine, I'll be the bad guy.
I will not put a chain twitch on an ear, but I have no other issues with twitching. Twitching saved the day frequently. My rule was to be as gentle as possible, but as tough as necessary. I honestly don't think twitching causes severe pain, but I know they don't like it. However, if they need to be twitched, I don't care if they like it. What I do know is that horses don't stand still for severe pain. They leave, violently, so there is definitely something to the endorphin release aspect. I usually joke that they don't stand still because it hurts; they stand still because it could hurt.
I am gonna stand up for all the farriers and vets who have to deal with their client's delicate flowers. Sedation and gentle technique are beautiful things and most of the time that is all we need, but sometimes more primitive techniques are warranted. I had several in-patient OPHs (other people's horses) that you had to "climb": skin twitch to get the ear twitch to get the nose twitch just so you can get the sedation on board so you could do whatever you needed to do in the first place. We weren't trying to be heavy handed, but we had a job to do and we had to work with what the owners gave us. These were usually nasty spoiled mares that were too obnoxious to mess with, so the owners turned them out to pasture to be brood mares (God, I wish I was just being snarky). The average mini was about the same and the burros I worked with were pretty bad too. Burros get much more touchy than horses about their ears, so I would nose twitch one instead of ear twitch. By the time we got them out of the hospital they let us do what we needed to do without twitching or drama, so our technique couldn't have been as traumatic as it seems in print.
I am now going to play my bastard coated bastard with bastard filling card. All you all get off your high horses about twitching. As an ex-horse doc who no longer has to put up with OPHs for a living, I can say what others can't. If you want someone else to jack with your "spirited"/"feisty"/"exuberant"/"energetic" critter and you don't like twitching, you dang well better get him/her trained to tolerate whatever it is he/she doesn't like 24/7/365 next to a busy interstate full of Mardi Gras floats and brass bands. Clinton Anderson calls this getting rid of all the "don't-touch-me-there" spots. Your vet's and farrier's backs, knees and shoulders are doomed, but that doesn't mean getting stomped, kicked, bitten or run over will be meekly tolerated. The dreaded and highly unpopular, yet incredibly effective serial gut kick may make an appearance.
I've said my piece. Let the flames begin.
Nate
Mostly harmless.