Re: 2/18 Buddy AMPS 175 (1.25u)...has mild hepatitis...
The biopsy will be able to tell you exactly what's going on with the liver. The blood work can tell you only so much. The ALT and AST are good indications of a problem, but if those values are not elevated, you could not tell of the problem. Biopsy is best; look at an actual piece of the liver to know, provided good sample taken.
I don't know the most recent biopsy procedures for felines, but maybe there is a test which is non invasive yet about as good as a biopsy. I am thinking of something like Fibrosure test for humans. I know; don't compare humans to cats, but the test was the first thing that came to mind.
Being old school myself, I am reassured by the invasive biopsy.
I hope you can get some good advice if you post the bloodwork results.
what I found quickly on the food part of it.
Hepatic Lipidosis in Cats:
This disease occurs in cats that will not eat for a variety of health reasons. Cats that are affected were often overweight. These cats may have stopped eating because of a change made in their diets or because of a stressful situation at home such as moving, kenneling or health problems in their owners. Secondary hepatic lipidosis also occurs in cats that suffer from diabetes, intestinal disease, pancreatitis or any other serious systemic disease. No mater what the cause, all cats develop an over-accumulation of triglycerides (fat) within their liver which blocks normal liver activity. Signs of this disease include weight loss, vomiting diarrhea, listlessness, drooling and jaundice. Laboratory tests reveal elevated liver enzymes and anemia. In treating this condition we try to address any underlying disease in order to get the cat to eat. Until this is done, cats need to be tube-feed energy-rich, high caloric foods.