This is a great article that explains which foods are good for liver compromised dogs and has a recipe.
Liver | B-Naturals.Com Newsletter
It's important to remember that these diets are for symptomatic shunt dogs. Dr. Center
does not recommend a special/low protein diet for asymptomatic MVD dogs. Too little protein can actually make liver problems worse so it's important to consult your vet before making any diet changes.