Well, we think Cathy is also gluten intolerant (commonly due to Celiac Disease).
So... about 14 months ago we started a series of tests that led us to understand that Cathy has two liver diseases: Non-Alcoholic Fatty Liver Disease (NAFLD, caused by Celiac Disease, we think) and Hepatitis C. Hepatitis C is a viral disease that attacks the liver, and it probably triggered the development of Celiac Disease, which in turn caused the NAFLD. It is supposedly quite common fo Celiac to stay hidden until triggered, such as by a large virus.
The side-effects of the Celiac Disease include rashes on Cathy’s body. The treatment for Hepatitis C may not have caused Cathy's skin problems, after all. We, so tossed out all the gluten we could from the house (including th cat sand).
We're adjusting rather quickly to the new thing, I think.
UPDATE 10/12/2006: Cathy saw another specialist and they want to do a skin biopsy, so she has to intentionally have some gluten to get a rash for the biopsy. Crazy, huh?