liver cirhossis

I'm wondering if anyone can tell me why my husband continues to lose about 10 lbs. about every 6 weeks.  he's now down to 147 lbs.  He has a very poor appetite but I feed him lots of food all the time.  whatever he's in the mood for, I prepare just so I can keep his weight up, but he still continues to drop.
the past couple of months he's begun to retain water in his feet and belly.  so he's been put on diuretics/HCTZ.  He sees the top liver specialist in Manhattan, who makes light of the situation.

Is there a doctor in the forum who can give me an idea as to his life expectancy based on his symptoms?  and what if anything I can do to help retard the progression of the disease?  I have him on herbal supplements to help the liver cleanse itself.