My two ferrets were also diagnosed by a lab. as this post had stated. Specifically, they had G.I. biopsis done when the vet did surgery for other reasons (one, insolinoma; the other, adrenal disease). Labs came back with high numbers that indicated, to the vet, various degrees of inflammation in the gut, bowel, stomache. So, they were being treated with drugs that had in the past shown the potential for reducing these numbers. For one, Linus, it worked, as far as getting these numbers down to close to normal. He still has the issue of hepatitis, however. For the other, Zooey, the vet succeeded in reducing these numbers but not as much. Both ferrets had monthly lab tests for a year before Zooey died and Linus reached stability. His recent lab tests indicate whatever is causing the inflammation in his g.i. tract is still being controlled. Minta & ferrets [Posted in FML issue 3888]