Just feel the need to give you a heads up here.
This link is to info on Liver Shunts from the University of Tennessee:
Portosystemic Shunts FAQ
You are not that far from U of Tenn... they are world leaders in LS diagnostics and surgical repair... and they are also the most affordable... Diagnostics tests, surgery, pre and post op care will all run under $2000.00 if done there. Also they have the highest success rate and have the most experienced vets (very important when looking at success rates)
Please investigate further before committing to having anyone else do her surgery. Other vets have been known to charge anywhere from $3000.00 to $8000.00 for the same services provided at U of Tenn.
Hope all works out well for you and your baby.. I'll keep you all in my prayers....