The mare I ride really cuts corners bad when cantering and she tends to drop her inside shoulder and go on her forehand. I have tried using inside leg and outside rein but then she turns her head towards the outside. So am I supposed to keep her bent to the inside, and inside leg on, and keep contact with the outside rein? I am so confused! Can someone please tell me in detail what to do to stop her from doing this! Also I am having trouble keeping her cantering. Thanks.
Oh and by the way I am only riding once a week so I can't really do a lot with her training myself if that matters at all.