Pearlsasinger
Up in the clouds
It sounds to me as if she needs a change of yard. The first mare we bought was horrendous on the yard we took her to for 6 weeks. We moved her, for various reasons, and she was immediately more settled and much better mannered. She moved twice again during her lifetime and was always exactly the same, not upset by moving. For some reason, she just didn't like the first yard.