Hi Sheryl-
I firmly believe there are two kinds of researching that can be done- researching and “researching”. One is reading peer review research articles published by professionals in the field of canine disease and nutrition and the other being reading consumer reports and opinions of pet parents who may or may not have accurate information. The ladder will cause your head to spin as the opinions change depending on which website you go to, who you talk to, etc.
There very well could be a better option out there for your dog than Iams, but I think that is a decision that should be made by you and your vet or a veterinary nutritionist who is familiar with liver disease and what role diet plays in managing it. You can do over the phone or email consulations with various nutritionists who can help you make an informed decision on what diet would be best.
I know this was probably not the answer you were looking for, but I felt saying this was more helpful than making a guess at a food recommendation.
