That could be a twisted tibia leg bone deformity, and no treatment can help. Here is a link about those:
https://www.merckvetmanual.com/poultry/disorders-of-the-skeletal-system-in-poultry/noninfectious-skeletal-disorders-in-poultry-broilers
Here is a post from WVDuckchick on how she fixed a baby chick with a dislocated hip in post 15:
https://www.backyardchickens.com/threads/splay-or-slipped-tendon-or-need-help.1262881/page-2#post-20274699