) on a horse of mine a few years ago who was a total nervous wreck. The Feedmark people said I would see a difference in about 2 weeks - well I saw a big difference in him within a couple of days
It certainly got us over a huge hump with the horse. I used it for a few months and then stopped and he is fine now.
I have used it and pretty sure it made a difference. My previous horse got very tense when he was left on his own when his field companion died. He was so spooky on hacks I daren't ride so tried it. He was definitely calmer but whether it was due to the steady-up or because he was getting used to being on his own, I'll never know!