If she is still recovering I would not stress her with a bath.
Can you give her a pan/dish/container full of dirt so she can dust bathe herself?
You could put a brick in her "room" and she can rub her beak down on it.
She is not a meat bird...meaning she is not going to eat herself to death.
She needs good foods right now to help her heal.
A complete chicken feed being the main part of her diet so she doesn't "fill" up on the other stuff.
Have you ever read this:
Proper FEEDING
That is a picture of the label on the chicken livers I buy.
Full of good vitamins but also high in protein.
Now I do not feed this too often but I think the extra vitamins and protein in them would be good for your girl.