I think I have her mouth issue pegged; my Paint's bit size is 5 1/2", loathes the single joint because of the "tent" or point it makes in her mouth hitting on her palate. I put her in a JP Korsteel Oval Mouth Loose Ring Snaffle, which is a double-jointed bit with a lozenge in the middle, and major problems ceased (constant avoidance and bad tension) last year, but now that I'm asking for more contact and seeking the bit work, I still feel like she's not 100% pleased with it. I checked her mouth after I put the bridle on, it looks like her tongue gets pushed out to the sides somewhat and there's not much room between her palate and the bit... also, I spy a pair of tiny wolf teeth.
Anybody have a guesstimate or such about the thinness/thickness of a bit and its relative pressure or sensitivity? I have light hands on her, as the booger learned from some beginners how to take advantage of any pull or tough grip by bracing on it. Does anyone use mullen mouths? I've heard they give an odd "wooden" feel for the rider. How does a mullen compare to a double joint?
I'd like to get some opinions. The ultimate decision is to be made when I get a equine dentist out to float her, I'll talk to him about it.