Muffin has been having leg problems for a few months now. I am not sure if she was hatched with that problem. She is roughly four months old, and is an EE. One of her legs seems to be slightly swollen in the hock and leg. The other leg is normal. Also, it seems that one of her legs is in the right place, and the other one is farther away from it, meaning her legs are too far apart. I'm wondering what could have caused this, what it's called, and how to treat it. I was thinking of trying to put her in a sling so that I can correct her legs. What is the right course here? I am including pictures of her legs here. The leg with the one lone feather on it is the good leg.
Bad leg
Good leg
From top view, both legs
Bad leg
Good leg
From top view, both legs