Kayella no official diagnosis yet. I've decided to go the muscular route, rather than skeletal route right now. I want to see where we are at in six months with this first.
Nokot I am still not ruling out something else, or even multiple things. I still question the stifle at times. Yesterday was one of those times in the round pen. I could actually see it maybe 'shift' a couple times during the walk after trotting. Not sure though. Plus there is the downhill stuff with her where she knuckles over those back feet. It's almost like she has peg legs and she doesn't bend when the ground isn't flat. She will put at least that right hind leg down straight on hills or uneven ground it seems.
She has improved in the round pen with 'controlling' her body more fluidly anyway...from what it was. So it is hopefully building a little muscle that lacked before. She will probably never be perfect, but I'm so happy to see it becoming a little easier for her.