Yeah, I absolutely hate to say it, but I have to agree with the last few posts. I can't imagine the pain the little girl is in. This poor baby is clearly in awful shape and I think that trying to save it may be futile and will only prolong its suffering. I'd take her to the vet and have her humanely put to sleep. I don't think there's any way to save the little darling. It's so unfortunate, because it's not her fault at ALL and you said she's feisty, so she has a will to live...
Well guys, he passed away this morning. He'd actually been eating pretty well so I decided to give him a chance, but unfortunately I don't think he was able to process the food and get any sort of nutrition out of it. For the couple of days that I had him it was very fulfilling trying to save his life, unfortunately he was just a little too far gone.