a dutch gag bit is a very common option for a strong horse as it has a leverage action which exerts pressure on the horses poll forcing him to drop his head and listen (usually(!!) )
it is often used with younger riders who dont use their hands properly and it is then a very sharp bit
If a horse is using a dutch gag often they don't suit a horse and you can easily tells this because every time you take a pull the horse throws his head to try and get away from the pressure
whereas horses that it suits just tends to get on with it
you can get it in different severenesses as some are fatter than others, some have a link in the middle and you can also get happy mouth versions in white, pink, lilac and baby blue
hope this helps
