I currently have a kimberwicke for my mare, and I bought a slow twist loose ring snaffle because I thought she was above the bit, but its just the way she carries herself. I feel that both bits are way to harsh for her, considering she's 4. I want to get her a plain old snaffle, but I don't know what kind. (jointed, french link, oval link). I also saw that there are bits that are curved and is more pleasant for the horse. Has anyone tried them? Or should I stick to a normal bit? And I was wondering what everyone's views on copper in the bit. Does it help the horse relax more or what?