I have been reading the thread and hoping that the outcome would be good for you chicken - so sorry to hear that she died despite your caring for her, I hate it when any of mine are ill and they die... my heart goes out to you and your daughter - at least she isn't suffering now.
Take care and congratulate yourselves that you did all you could to help her!
we think she did not have alot of grit and she ate alot of grass so she probley could not break it down and she was not eating i hope that our other chickens do not get sick you can tell that they miss her to