How exactly does twitching a horse work? I have never done it.... but when I was little I was told it just "keeps the horse distracted". Is that true? or does it hit a nerve that kinda "calms" them? I am just interested as I was suggested to try a twitch on my filly next time we get he feet done, shes great about letting me mess around with her hooves, but whenever we get the farrior out she has a spazz attack.