Gosh, how very worrisome
. I'd try boiling some chicken and try feeding her some chicken w/ white rice.
But also, try sprinkling Parmesan cheese (the kind in the can) on her current food - Parm is nice and pungent and often will entice a dog to eat. Dogs eat first with their nose, so it may help.
Good luck, hope she feels better, and keep us posted.