Mike, Your vet was possibly right about the adrenal tumor. The symptom you described sure does fit it. It is possible for them to re-grow hair. I suppose it is even possible for there to be a spontaneous remission, but if it does re-occur (which it often does) don't worry too much. Please DO find another vet. From my experience, adrenal tumors are very readily operable, and usually successfully done too. Once the bad adrenal is removed, hair growth and normal live span can be expected. Your vet's comment about not wasting your money on a vaccination seems to me to express a woeful lack of knowledge of ferret heath and care. But I'm sure you'll be getting other answers to your post, and maybe from our very ferret knowledgable vets who join us here on the FML. Dick B. [Posted in FML issue 1200]