Just a thought but for nutrients in her does anyone have an opinion on giving her the liquid kitten food suppliment for kittens that are abandoned?? or possiblly human children pediolite?? that way it is liquid so stomache doesn't have to work to hard to digest it but still get electrolites and nutrients?? Maybe ask your vet about it??
On the other.. sometimes it is in the best interest of the animal if they are suffering that much to let them go. Not good for us but have to think of the animal.. What does your vet suggest in this area??