hi, I'm sorry I can't answer your question about your cat, I would suggest you post this on the 'holistic cat forum' and see if Dr. Osborne can answer this for you.
Good luck.♥
http://www.medhelp.org/forums/Holistic-Care-For-Pets/show/374?camp=msc
As you can see you have received excellent advice above and if all that fails to help dogs are fun!
I had thought about the fish oil aspect but I was reminded of a study by Sylvester and Katz, el al which warned of seisures and the potential onset of catatonic lethargy with excessive doses.
You forgot to advise for fish oil...
I'm not sure that your question can be adequately answered in a Hepatis forum, but I'll give it a try. First, it needs to stop drinking alcohol immediately. Although it's fairly obvious, many cat owners overlook this precaution. Also avoid any feline foods that might include tuna that might contain mercury. Lastly, see a qualified Vet who might recommend a CATscan or a PETscan. Good luck.
You somehow managed to post in the Hep C forum; and nope, this isn't like Hep Cat. I think Medhelp has a veterinary forum somewhere.
Bill
I'm sorry this is a hepc forum I dont have any idea about cats gpt at all. :(
Wishing you luck though!