Sounds like Marek's which can still be a possibility despite vaccination. If she has a low virulence strain, she can recover. Have you tried giving her aspirin to help reduce inflammation in her legs?Update: I’m not sure I’m seeing much improvement after a week’s time. She really isn’t using her feet and lower legs to stand, move, or support herself. She is using her wings to upright herself and she always sits on her hocks. She moves around by going backwards on her hocks. Can chickens feel things in their feet? When I touch her feet or try to stimulate them, she doesn’t react at all. They don’t curl. She doesn’t pull back. Nothing. She is still eating and drinking and acting like a normal chicken, other than using her lower legs and feet. Any suggestions?