I am so sorry this has happened to you and your chickens! Like others have suggested here, I believe your hen is in shock and she is terrified, confused, and lonely. I agree with those who suggested you baby her and a mirror and special time with her human flock members might help her to feel better.
I would consider either getting a few more chickens for her to hang out with as soon as you can secure your coop and/or run, or rehoming her if you can't. And yes, find healthy chickens of similar age.
I would consider either getting a few more chickens for her to hang out with as soon as you can secure your coop and/or run, or rehoming her if you can't. And yes, find healthy chickens of similar age.