I recently got a new horse under the impression that she was fully trained and only to find out she is still green. She is great on the ground/lunging and responds well to voice cues but as soon as I get on her she thinks its a free for all and runs around like a maniac and totally ignores any cues I give her and fights with my hands the whole time. Any advice on how to get her to soften up and give in to my hands ?