I'm sorry about your girl.
This caught my eye. Let me preface this by saying I am not a vet. However. After spending hundreds and hundreds of hours watching vets I have. Ever seen those dose of fluids given. 300ml? Or is that a typo? The yorkie dose is about a third of that. There is no way a yorkie will absorb so much so fast and it is not healthy. JMO. She was given too much.