I'm sorry your little girl is ill. I don't have any experience with liver shunts or the Hope Center, but I've heard many successful stories on YT. There are many surgeons using her techniques, but Dr. Tobias at the University of Tennessee (Knoxville) is an expert on liver shunts. I will keep you and Sadie in my prayers. If you haven't read this PDF on portosystemic shunts,I think you will find it helpful. Please let us know how your baby girl does.
http://www.vet.utk.edu/clinical/sacs...2013-09-26.pdf