Last week, while riding in the arena I asked her to move from a walk to a trot (we had been trotting earlier without a problem). Trotting, in general, is not her favorite thing to do but up until this point we had been working on it and making progress. When I asked she pinned her ears and acted like she was ready to start a personal rodeo. Not wanting to end on that note but recognizing it was not safe to proceed, I asked her to walk and we worked at a walk for another 5-10 minutes.
Fast forward to yesterday, I was longing her before riding and noticed that she was extremely irritable at any command I would give her. Every time I'd cluck or kiss to move her up/down she would pin her ears. Her movement looked fine, no soreness etc. I untacked her and tacked her back up to make sure that there was no issue, which there wasn't. Anyway, I continued to longe her until her attitude went away and by the end she was responding normally. I hopped on and rode her at a walk with no issues. An important point here is that she also, on her own accord, tried to move into a trot on her own on several occassions and I slowed her back down into the walk. Now when I asked her to trot, she threw the same fit as before, ears pinned and ready to buck. So I walked her in a few more circles, then instead of using leg pressure, I just clucked to move her into the trot (thinking maybe the pressure was bothering her) and she did the same tantrum. So I then walked her a bit, which she also on occassion pinned her ears at, but it wasn't as bad.
I picked up some mare magic, recommended by another gal at the barn, to see if maybe that would help but I'm a bit lost as to what else to do. Any suggestions?