Could be her back for sure. She is not moving her legs that I have seen, and I have to keep moving her because she is laying in her own poop.
If I stand her up like normal, she likes that, and will start eating.
I don't want to cull her, she is sweet and her comb is just starting to turn red. So, she might be an early layer.
She does keep one leg laying out to the side, they are both kind of floppy, but not at a weird angle.