Here in post 15 by @WVduckchick is a link about treating a dislocated hip or knee that you might want to read:
https://www.backyardchickens.com/th...don-or-need-help.1262881/page-2#post-20274699
https://www.backyardchickens.com/th...don-or-need-help.1262881/page-2#post-20274699