So I recently took in a barrel horse tune up, she has been off all winter and the owner asked if I’d put a few rides on her to see where she’s at. I did not start this mare, she is a long 4 year old. 

She is really hot, sweats herself out at a trot when not getting asked to go fast at all. The first few rides I mostly worked on speed control, she seemed like she was picking it up and on ride number 4 I was asking her to yield her hips and when I asked her to yield left she had a come apart. I got her out of it and got her to go on and finish on a good calm note. On ride 6 as soon as I asked her to disengage her hips to the left she had another come apart, originally I thought she was fighting the bit, she is really mouthy on it, so I tried a side pull. She was really relaxed in the side pull until I asked for her to disengage her hindquarters to the left. On the ground I went all over her body, she is really touchy on the right side near the back cinch. 

Any ideas besides just going back and working on her sensitive spots?