Crazy ASS HORSE!

So... not sure what happened to my horse. She was nuts at her old barn, but I would take that over what she's like any day. I pulled into the barn today and saw a horse rearing up while it was being lead to the mud pit they call a turn out (more like a holding cell.) I thought, "Wow, someone's horse is nuts!" I ran over to see if I could help the girl leading the horse and low and behold, it's mine. She looks frantic all the time and is a huge pain in the ass. I can't lead her anywhere. I pretty much have to back her anywhere we go for my saftey, her safetly, and anything that could get behind those hind legs. They are powerful!