Can you get photos of her standing from behind?
Any photos of when she was younger that shows how she stood?
How old is she?
I agree, the 30% feed is too high of protein for long term use, the feed instructions say to feed to 10weeks of age, but up to 16weeks. So I'd start transitioning to a lower protein chick starter or all flock type feed that is 18-22% protein.
Do you raise Gamebirds (Quail, Pheasant, Turkey, etc.)?
The leg that is out - can you feel the joint to see if the tendon is slipped out of place?