The photos are hard to see. Where are the bare areas? I see some feather loss above her tail, which actually loooks like pecking. She may have been dumped/abandoned or got lost. I don’t know whether a chicken would run away due to bullying, but at a glance, she doesn’t look too bad that I can see.
You have received good advice from @coach723. Once you can, please do post good photos of the foot pad.
You have received good advice from @coach723. Once you can, please do post good photos of the foot pad.