Hen leg just hanging, broken?

[Phoenixrise]

Ok upon inspecting my chicken again I would say the problem is in the hock joint. It just sways and turns and there's no resistance there. I can just twist it and turn it and it's just limp from that point down. It's like the joint may be broken? Does anyone have an idea of what can happen to a hock joint?
She's the same as yesterday, hopping around on one leg, eating and drinking.
I've separated her from the others where she can rest.
Thanks so much!

I have the same problem. I’m not sure how she got hurt but she can’t put any weight on it. She is less than a year old. This is my first batch of chickens raised this spring so I don’t know what I’m doing, but trying to learn and now very worried about her. Video links below: