My mare Razz has a really rough canter and it's near impossible to keep you butt in the saddle throughout the gait. My riding instructor has told me that I'm obviously sitting it as best as I can because when I have Razz canter my legs don't move and are steady. But I look like I'm not sitting her canter well because every time Razz brings her hind legs forward, I get launched off the saddle making it look like I can't sit it. I'm been told a number of times by various people, one being a judge, (and it's really kind of getting annoying) that I need to slow her down. Sadly though, I really have no idea how to do that, I mean there's the obvious way of using the bit to slow her down, which is only so effective in both slowing a horse down and smoothing out a canter.
Sorry for the novel, but I thought it was necessary for you all to know that I really need help with this. Does anyone have any suggestions for me on how to not only slow her down, but to smooth out her canter.