Aww, I'm so sorry. I would highly recommend you go to the link below and sign up to become a member of this group. They will be able to help you.
http://pets.groups.yahoo.com/group/L...d_MVD_Support/
How does the vet know it is a shunt? Did he/she do an ultrasound?
If it is an extrahepatic shunt (outside the liver) surgery will be attempted. Dr. Karen Tobias of University of Tennessee has a very good success rate (along with a few others).
If it is an intrahepatic shunt (inside the liver) surgery can't be done.
If it is Microvascular Dysplasia (small shunts) surgery can't be done and the dog is supported with supplements and a low protein diet.
What are Ludo's pre and postprandial bile acid numbers?