Weight loss

My question is why is his weight continuously dropping? He's down to 6.6 lbs and I'm real worried about him losing any more. Tom has been tested for everything under the sun..T3 for hyperthyroid, leukemia, FIV, you name it! His FIV test is inconclusive since he's been vaccinated all his life. We have deductively come to the conclusion he has stomatitis and it flares up in the back flaps of his gums. He is currently getting steroid injections when they get real bad, about 2x month.  He is eating fairly well, 2 packets of Whiskas at least and some cat milk a day or what every he wants. Sometimes more. Is there some diet or holistic remedies to help him pack it back on? I want to get him up to 8lbs. Any suggestions would be helpful.

[Dean Vicksman, D.V.M.]

Thanks for coming to medhelp.org
Its obvious you care for your kitty a lot.  It sounds like your kitty is losing weight in the face of a normal to increased appetite.  Several thoughts come to mind.  You mention that the T3 was normal.  More importantly what about the T4.  Was it normal.  I also assume the blood sugar was normal.  One avenue that does not appear to have been explored is a GI problem.  If it has not been done already I would recommend xrays of the chest and abdomen.  If those are normal next I would recommend an abdominal ultrasound.  That would allow us to look at all the abdominal organs including the intestines.
Finally its possible his stomatitis is related but I doubt it since he is eating well
Hope this helps.
Keep me posted.
Thanks,
Dr Vicksman