tele_mark says:
He had a relapse of the last episode after I took him off the antibiotics and had a vet visit again today. He had an ultrasound, and now it looks like it wasn't hepatitis, but probably IBD due to food allergies or something related to diet. Apparently the inflammation in the intestines partially blocked the bile duct from the liver and caused liver inflammation, and the antibiotics knocked the IBD back temporarily until he was taken off them. He may also have gall stones and is being medicated for that.