This is misinformation; no doubt well-intentioned, but wrong.She will get better just give her a small but of protein(A.k.a. oyster shell) but not too much or it could injure her stomach just sprinkle some around her she might eat and give her a small water bowl
Do not give her oyster shell - she will only need that when she's laying. (And it is not a recognized source of protein.)
I think her colour is very peculiar. What does her poo look like? What is she eating?