My dog Sophie has a liver shunt issue and my Vet put her on LD Science Diet and she started out liking it and now she won"t eat it so I'm looking for a no protein and low fat food.Even if I would have to add a gravy from people food or similiar I would because if not she could die as this issue is serious and she"s 13 yrs so surgery would be last resort as she might not survive it. Any help would be appreciated