I definitely agree with the above. When I went to try out my Thoroughbred, she was being ridden, and jumped in a twisted wire full cheek, and a standing martingale that was so tight she could barely move her head at all. When I was riding her, I had literal loops in the reins because I did not want to touch her mouth at all with the bit. I never actually had to ask why they rode her in what they rode her in, because the girl explained it all. They decided that the then 7 year old relatively green Thoroughbred needed a harsher bit cause she didn't listen, and they actually stopped riding her shortly after they got her. The trainer was the one that rode her for the rest of the time until I got her. I even jumped her over 3' fences with very loose reins, and she did excellent. Very nice and calm and quiet. As soon as I got her home, I switched her to a french link loose ring, and got rid of the martingale completely, and she was awesome. A harsher bit does not solve the problem, as the problem especially in a horse that young, is often rider error, and inexperience on the horse's part.