[QUOTE=Draftmare;8836962]
For those curious, here are the rules: http://westerndressageassociation.org/wp-content/uploads/2012/11/WD_Equipment_Guide.pdf [/QUOTE]
Those are some WEIRD rules on bits.
[QUOTE=Draftmare;8836962]
Out of curosity, at what point is a bit considered just a short shanked snaffle or a dog-bone bit, and at what point is it considered a Tom Thumb? I have always been told terrible things about Tom Thumb bits. [/QUOTE]
In my uneducated opinion , itās a bit of an oxymoron to say āshort shanked snaffleā since technically a snaffle is not supposed to have any leverage (or shanks). I would call it a short shanked curb bit with a broken mouthpiece.
A Tom Thumb is this bit. It has a single jointed mouthpiece, and the shanks are straight.
This bit is similar to a Tom Thumb, but it is not a true Tom Thumb because the shanks are curved.
Now with that said, I personally would steer clear from both of those bits. The main problem with the Tom Thumb is it is just poorly designed for how it signals the horse and how it is balanced. There are certainly better options to choose from.
In general, a bit that has more curve and āsweepā to the shanks will be āmilderā because it takes longer to engage the curb action. A bit that has straighter shanks will be āharsherā because the bit will engage quickly. And of course, the longer the shank is, the āharsherā because it will apply more leverage.
Of course, a bit is only as good as the hands behind it.
I personally believe that a horse should ride well no matter what bit I put in their mouth (good training is good training) but of course, there is going to be a bit that the horse likes the best and goes the best in.
I donāt know that you got into any details but how DOES your horse go in, say, an O-ring snaffle or D-ring snaffle? Heavy on the bit? No brakes? etc?
Could you work on your horse to go better in one of those options?
With that said, I know that a snaffle isnāt always the answer. My horse Red for example will go in a snaffle if I ask him too, but he truly doesnāt like them. Heās much happier in a short shank.