Hi, my prayers are going out for your friends kitty. My cat Silver had an episode of fatty liver about a year ago when she was 13. My only clue was she stopped eating suddenly. Two days without eating and off the vet she went. This wasn't a really serious episode, her numbers were up just a little, but they said to force feed her because sometimes the kitty will just 'forget' to eat once they stop. I did and she regained her healthy appetite after just two days. Good luck!