The title alone seemed graphic, but curiosity got the best of me. This sounds so horrible. The best advice here is definitely to put the chick down, but then again, if she's still going, then I'm curious of what will happen. If you are willing to let her go on, then I suggest keeping her in a dark space where food and water is easy for her to get to. If you really wanted to fight for her, I feel like there is more that could be done for her, but I think in the end, she may pass on her own. It'd definitely be a miracle if she does pull through.