I am so sorry that Bell and you are going through this. It is heartbreaking to see them not feeling well.
I know that custard used to be used to get nutrients into people, do you think if you made custard and (please don't think I'm crazy here) a little whipped cream with chicken or beef broth in it, that she might eat that? Even egg salad. I know that my girls have always loved egg salad, it has been a last resort on a few occasions.
Sending more prayers and good thoughts your way.