I had the same thoughts.That does not look like liver disease (there are many liver diseases other than fatty liver disease) . Yellow urates are the really telling indication.
When did you start the vitamins - before that poop?
Is she eating any pellets, or a full seed diet.
Is she getting any vegetables.
Does she eat fatty things?
Is she overweight?
Does she get a good amount of exercise.
Exercise and a lean diet are your best defenses for liver disease.