PLEASE get this baby to MSU or Oakland or contact Ellie May's Vet, her Vet is excellent with Liver Shunt knowledge.
What you describe is truly the classic Liver Shunt symptoms and she really, really needs to be on the proper meds to rid those toxins that are building up in her tiny little system. Those toxins need to be out via Lactulose and poop. These toxins that her liver can not filter are causing the seizures and the neuro behavior.....
And whatever you do, please do not feed her meat or organ meat. Liver shunt babies do best on Veggie or Dairy Protein (minimal amounts though)...
Please keep us posted, we are all praying