Join Date: Nov 2009
Location: Brisbane, Australia
If she's getting hard in the mouth doing trot work with a d ring snaffle, a dutch gag will only make it worse in the long run.
If your horse gets hard in the mouth, you need to take it back a bit and start training them to give to bit pressure again. Make her listen to your seat aids as well.
If a horse gets hard in the mouth and you put a harder bit in, they're eventually going to harden up to that and you have to keep upping the bit until one day you have a horse that runs through everything with no where to do next.
Experiment with the different snaffle mouth pieces. Mullen, single jointed and french link. There are happy mouth, rubber bits, normal steel, sweet iron, copper, ones with keys and ones with rollers.
Lots of different snaffles that you could try before you feel the need to go to a dutch gag.