lesson. BRRRRR. 9:30 am and windchill of 19. but not too bad in arena. tacked up quick and hacked along edge of XC to get to arena. wanted longer walk warm up but didn't get up early enough. did a lot of stretchy trot on the buckle once in arena. she started out sluggish and bracey and lost her hind end at least 6 times. Hard!! Like made divots in the arena hard. cantered her and she got better and only lost her hind end once (after we jumped the grid a time or two). felt more forward and happy after we cantered. rule outs: muscle myopathy, cold and tight, tight in general, KS, stifle stuff but seems more neuro than stifle, neuro, ?? then did canter poles and was game to reach for them. then slowly raised small jumps. talked with jacel. Jumping off hind end... really sitting and pushing. jumping straight. jumping out of stride. So... not inclined to think hind end, despite the falling out. and odd that she gets better with work and jumping, which again... doesn't lend toward...