Here's the story/history:
She came to me with her own tack that has been used on her for the past several years. The bit she came with is a tom thumb I'm assuming - at least, from looking at pictures of different bits, that's what it looks like. Although the "cowboy snaffle" and the Tom Thumb look similar.
Anyway, The first time that I tried tacking her up - the bit didn't seem to suit her at all. It was turning inward and going in her mouth ... it seemed like it was to narrow for her mouth. I don't know what the deal was/is. It sure didn't appear to suit her at all - and she was really mouthing it because of how it fit her. I took it off her right away and put it on a back shelf never trying it again.
After that I purchased an Indian Bosal for her. I tried her with that and she did "ok" but we had some issues since she's used to a bit and NOT a bosal. So now I'm thinking about purchasing another bit to try and decide what works best for her.
So ... that being said, Is there simply something going wrong with her old bit that came with her ... and I just can't figure out why it fits her that way, OR should I go ahead and buy another bit ... and if I should, what type of bit should I buy ... the same ... or something different?
I ride western. She's a pretty good horse, just bullheaded (sometimes VERY bullheaded) so she does need something that will make her listen. But I don't want anything "harsh" either of course.