If her feet are turned out, still sounds like slipped tendons to me
The tendons move to the outside of the joints because they have slipped out of the grooves, rather than moving back and forth over the hocks (in the groove). Once the tendons move to the side of the joint the keet can't stand. It hurts and limits the strength she needs to stand.
So... I'd try bracing her feet/legs up with a thin strip of vetwrap or some kind of sticky bandage (same method used to correct splayed legs). Use a keet her same size for a reference as to how far apart her legs need to be. See if she gets up and walks, having to deal with the limits of the brace. May take a day or 2. Or she may not respond at all and continue hock walking.
Check her breast, compare to a few other keets her same size, if she is thin in the breast area compared to the others then she is not eating or drinking as much as the others... and that indicates she is in pain.
Hope she pulls thru this
, but in my experience it's usually not a positive outcome with keets that start walking on their hocks. The longer she does it, the worse it gets. She can't survive as an adult like that, she'll be easy predator bait. Plus eventually she will develop sores on her hocks