It’s a common misconception that snaffles are the mildest bits and, therefore, you should use one whenever possible. While it is true that only the nicest horses go well in a snaffle, it’s because they’re the only ones that will put up with them, NOT that they are the only ones that don’t need extreme pain in their mouths to behave. WHEN did extreme pain make a horse go better? It’s all about clear communication and making the horse comfortable, two things that snaffle bits do NOT provide. Why? Let’s take a look.
Communication: Snaffle bits are FLOPPY. Their jointed mouthpieces make them that way. Pick one up and it flops, with a LOT of movement. It’s the same way in a horse’s mouth. A horse can’t tell whether the movement of the bit in their mouth is because they swallowed, moved their tongue, moved their head, or you are putting pressure on the reins.
Making the horse comfortable: When you put pressure on both reins with a snaffle bit, the bit rings move closer together, which causes the mouthpiece to ‘bend,’ becoming pointy instead of relatively straight. This ‘point’ (the joint in the mouthpiece) digs into the roof of the horse’s mouth. When a horse raises its head or opens its mouth in response to rein pressure, it’s just trying to avoid that pain. If you think the roof of the mouth isn’t sensitive, try biting on a potato chip wrong and having it poke you in the roof of the mouth. Ow!!! The common response to that is to tie down the horse’s head and tie its mouth shut. Why does every “dressage” bridle come with a flash noseband (only purpose: to tie the horse’s mouth shut)? To keep the horse from avoiding pain. How sweet.
Solution: Unjointed mouthpieces, or no mouthpiece at all. If you want ‘safety,’ or 'control, try a Pelham. You may say, “but they’re so CRUEL!”. Not so, but if you think so, try one without the curb chain or curb (lower, thinner) rein. That ELIMINATES the curb action, leaving a straight bar bit (unless you’ve gotten a jointed-mouth bit, in which case, forget it) that happens to have some extra stuff sticking out. When I Learned to ride, the common thing was to START a horse or pony in a snaffle, and if that didn’t work, go to a Pelham. They ALWAYS worked.