Basically, this is a horse who LOVES people and would do anything to please them. She has 100% perfect ground manners. She has NEVER bitten anyone and has only kicked someone once (my fault). Other than that time she hasn't even threatened to. She has NEVER reared, bucked, or bolted under saddle. I ride her bridleless and she NEVER does anything but exactly what I want her to do. She has thousands upon thousands of trail miles on her.
Within the past week, she's taken off with me twice out on the trail. She wasn't scared... both times we were trotting along and she broke into a medium canter and wouldn't slow down or stop for a while. Both times I managed to stop her once and she took off again. Then I got her to actually stop. Both times I got after her and she was perfect for the rest of the ride.
During the past week, she's been pinning her ears at people when they walk by her stall. She doesn't glare at them or bare her teeth or even move... she just pins her ears. If you open her stall door, her ears pop up and she's back to normal. This is something she has never, ever done before. She honestly loves people and loves getting attention from them. She doesn't pin her ears when I spray her face with the hose, when I clip her face or ears, when I tighten her girth, or at feeding time. It just doesn't happen.
Now today, when my BO's son went to take her out of her stall to turn her out, she reared straight up and tried to land right on him. He had to jump out of the way. She ran out of the stall and wouldn't let anybody touch her.
I know some of these things might not sound that bad... might even be normal for some horses... but it is NOT normal for her, and that's why I'm worried.
I honestly can't think of anything that has changed in the past week. If you have any ideas, though, please ask because I might have forgotten something.
So... any ideas about what might have caused such a change in behavior?
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