Will a martingale keep a horse from rearing?
If your horse is really determined to rear, probably not. A
martingale is not a good solution however, because it does not
solve the problem, it just covers it up, kind of like a bandaid
sort of. If you have checked for any paint he horse might be in,
like a poor fitting saddle, a wolf tooth, ect. What works really
well with rearing horses is when they rear up, pop them right
between the ears to make them think they hit their head on
something. How long they have been rearing will determine how many
times you have to do it before they stop rearing for fear of
hitting themselves.