You could try some bone broth it's easy to digest and will help keep her hydrated. It's also good with calming down digestive system and boosts the immune system. Doggies fish soup is also good, hydrating but very gentle on the stomach. I just do baked white skinless fish in a deep baking dish with water so it's falling to pieces serve the fish but keep any fishy water to pour on any food. I'm so sorry she's having such a hard time.
won't go amiss xx
So very pleased for you. Well nursed!