Join Date: Aug 2010
Location: Central Missouri
Contrary to popular believe, twisted snaffles are not harsh. With some horses they are the mildest bit you can use. However, you don't stop a horse by mouth pressure, unless you want to create problems, like the one you just found. Teach the horse to stop more with your seat and/or the one rein stop. You probably need to go back to ground work and get the proper whoa(stop).
It could be a tooth problem, but not likely, sounds more like it was an accident just waiting to happen, based on current stopping method.