Look into the whole pain thing, yes, and why are you riding a horse you KNOW has sore feet?
My other question is what defines "bratty" prior to this and how did you deal with it? To me it seems entirely possible that this mare was testing you, you failed, she won, and now you have a real problem. Just my theory.
I did not see that the mare is now alone, but yes, that may make her anxious, since they are herd animals. It also sounds like the laying down incident was right at the time you brought her home? Before or after? Which is it. Both were 2 weeks ago?
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