10 month old hen injury to thigh; doesn't put weight on it

[emilyenorris]

I noticed about 6 weeks ago that my silkie mix hen started hopping on one foot. I looked at her foot then and did not see any scabs or injuries, so I suspected that she must have sprained it somehow. She continues to roost with the other birds and hops around the yard not putting any weight on the right leg. She still has grip in her injured foot and the joints move without problem when I move them. I do not see any problems with the visible leg. I noticed yesterday that he upper leg thigh area is swollen and warm to touch. I can not find any puncture areas or wounds. When I part the feathers, I noticed that some of her skin is a different color. Sort of a yellow splotchy color and the rest is a dark color. This might be normal for her. I have never looked under her feathers. I am not sure what to do for her. She is still eating and drinking without any problems. Around the time that I noticed her limping, I had a bull snake in my coop. It is probably a coincidence.
I would appreciate any help. Thank you.

 

[sourland]

The yellow splotchy coloring probably is bruising. Hopefully time will rectify the problem.