Original sentence: A bearing rein, known today as an overcheck or a checkrein, is a piece of horse tack that runs from a point on the horse's back, over the head, to a bit.It is used to prevent the horse from lowering its head beyond a fixed point
Edited sentence: A bearing rein, known today as an overcheck or a checkrein, is a cruel piece of horse tack that runs from a point on the horse's back, over the head, to a bit.It is used to prevent the horse from lowering its head beyond a fixed point by pulling it up unnaturally high, leaving the horse in terrible pain