In October I purchased a 4 year old warmblood x thoroughbred mare. She is very sweet, and WAS quiet and well behaved. Not spooky, very calm, nothing fazed her etc. For example: I was having a lesson while a tent was being put up in the arena - tarps flapping, poles clanking and she didn't bat an eyelash. Now all of the sudden she seems to be the complete opposite. I realize she is 4 and a mare, so there is going to be some attitude, but I find myself getting very frustrated with her because she started out so nice and calm. About 2 months ago, she did 3 big bucks out of nowhere and sent me flying. Very unexpected. Since then she has been a bit bucky picking up a canter, not too concerned about that, but she is spooky about everything. For a while I was lungeing her before every ride. She has always been good on the lunge. Now I do a lunge about once a week, and she acts up with the bucking rearing etc. Some people think it's ok for their horse to buck and get all of that energy out on the lunge, but I believe she is working and still needs to behave. She has also developed an attitude about coming inside. I can catch her fine, lead her out of her paddock fine, but turn the corner towards the barn she acts up. Rearing, trying to bulldoze me, spinning in circles etc. I use a chain around her nose now, which does help, but she still acts up. She is also misbehaving for the farrier - rearing, fussing etc.
I don't know if I'm just being too impatient, or if there is something more serious going on. Any suggestions would be appreciated :)