My green broken mare is quite a handful to ride, but it's made worse because when I get her to do a one rein stop she tries to bite me on the leg! I don't know how to prevent her doing this because I need the one rein stop to stay safe but I also need my leg intact. She knows what a one rein stop is, and I get her to do it on the ground as well to reinforce it. The biting is her being annoyed with me for stopping her playing up under saddle I think. Any ideas?