My horse is a 5 year old mare aqha registered a sweetheart!! Can be bratty but I finally brought her home from where she was at...she has been here for two weeks exactly and the first couple of days she kept bucking while I lunged her she got out of that but now she is bucking when I'm riding her not a little crow hop but I still stayed on...somehow...then I lunged her right then and she was a maniac! I had a show a two weeks ago a she layed down! Her saddle was not tight and nothing anywhere!! Another thing is she is alone I have a radio playing all the time but she realy like other horses sooooo what do you think?? Also I am riding her in all the same thing the bridle to saddle pad help!!
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?