I right now have a mustang mare who is just green broke. Recently, I have been training her to pick up her gaits on command. Doing this, I ride her in either a bosal or a plain snaffle, and she's perfect. Though, the problem is, I can only use the snaffle for a year, then I have to change it because of rules. That's where the problem comes in. She doesn't like other bits. We've tried a normal curb on her, and she hates it, and throws hissy fits. She only rides in a snaffle or the bosal without a problem. I was wondering if there are any soft bits besides the snaffle that could work with her so she doesn't throw a hissy? We've really always had problems with her since her mouth is so soft, which I have absolutely no problem with, but all the other bits are too harsh for her it seems. So yeah, any suggestions for what I could try on her?
Edit: I have always been thinking of a hackamore for her, but when it comes to those, I really am lost. I understand like, the thicker it is, the less pressure, but I'm still not completely sure what I would use. She does work best with nose pressure we've found, but like I said, I'm lost.