Originally Posted by BluMagic
I take a huge ammount of the horse's comfort in mind when I think about double bridles. There should be no reason a horse should need TWO bits. Why not just one or the other?
Because when you're excecuting the upper level movements, you need that extra little edge. It is not inhumane, I've used one on both of my horses, and my mare was THE most soft-mouthed horse in the world - I rode mostly on the snaffle rein, and just picked up on the curb rein when I needed the little "listen to me" edge.
It's the best of both worlds; you can ride on the snaffle, then have the curb right there when you need it for a couple of seconds - no switching bits.
And it doesn't crowd the mouth; the bits are slightly thinner, but not at all to a point where it's wire thin.