Okay so my new horse runs me into the fence while I am riding her. It isn't until closer to the end of ny lesson when she gets worked up. She has no reason to get worked up though. We just do basic walk, trot and canter. She gets fat at the walk and trot so we are working on slowing her down. But here is the problem... Once we have cantered nicely for a while she will do a VERY sharp and very quick turn into the fence of the arena. Shell turn and hit her chest on the fence and stop. I've tried turning her the other way right before she does it but sometimes she is too fast for me. And I'll take my foot out of he stirrup and kick her in the shoulder away from the fence and I'll smack her on the neck on that same side with a crop. It doesn't seem to be working because she is still doing it. I'm starting to get worried that I'm going to get really hurt on her. During my last lesson she did it and I ended up coming off. But my arm hit the fence and I somehow landed on ny feet. But next time it may not end so nicely on my part. Does anyone have any suggestions on what to do?? My lessons are only an hour long. Do you think I should have shorter lessons ad gradually make them longer as she can go longer?? She is in very good shape I think she just doesn't want to do the work anymore so she tries to get me off.