A liver shunt does not equal a death sentence by any means at all. If she has an extrahepatic shunt that is operable, then the shunt can be fixed. Even if you find out she has MVD, that can be managed through diet, lactulose, and supplements. She can live a normal life.
I would never recommend k/d or i/d to a liver compromised dog even if some vets recommend it because they both contain pork liver which is extremely high in purines (not good for liver compromised dogs). Also, the i/d contains turkey which is not good for liver compromised dogs because of the tryptophan. They can't handle it the same way as healthy dogs because they don't metabolize things they same as normal dogs.
http://pets.groups.yahoo.com/group/L...d_MVD_Support/
Please join the group and tell them your situation and her bloodwork or any other relevant information you may have. They will help you.