I have a 5 y/o quarter horse who had a year of cutting training before I purchased her. At the canter lately she bobs her head up and down the whole time and constantly tries to break out of it. Also, when I pick up her front left leg to clean her hoof she has trouble standing and holding her self up and often practically falls. I know I am most likely going to need xrays done but wondering if anyone has any idea of what this could be or how to help her? I was thinking it could possibly be an old injury from cutting but not sure.. thanks!