2 of my horses have recently started to lose the hair, one has only lost it from his face but the other is losing it in clumps from all over her body. Both only have bare skin underneath, any ideas what this could be? These two horses have been out with others all winter and none of the others...
personally i don't think you are rising that high and i think you have a lovely position :)
maybe try pushing you heels down more to keep your leg steadier, and push your horse forward more into the bridle (maybe add osme spurs of a whip if he's a bit difficult??). Also as others have said...
dont worry, my horse was exactly the same. i took him to his first dressage show and he bucked all the way around, and the second time out was inches away from kicking the judges car!!
just be patient and keep taking her out... its probably very exciting/scary for her and she is still quite...