Bilateral loss on the trunk is virtually always adrenal disease, and losing the fur over the sacrum is on the signature places to lose the fur with adrenal disease. The sacrum is the part of the lower back just above the tail. If you are in Europe or in Australia (and I think also parts of Asia) and can't find a ferret knowledgeable vet then tell the vet about the deslorelin implant to use. If you are in the U.S. there are more lists of ferret vets and if you can't find one then Lupron Depot and melatonin implant. http://ferrethealth.org/vets/ http://www.ferret-universe.com/vets/vetlist.asp and in the following you can see which vets the shelters use: http://www.supportourshelters.org/ There are others. Use the links in my sig lines to learn a lot more. Sukie (not a vet) Recommended ferret health links: http://pets.groups.yahoo.com/group/ferrethealth/ http://ferrethealth.org/archive/ http://www.afip.org/ferrets/index.html http://www.miamiferret.org/ http://www.ferrethealth.msu.edu/ http://www.ferretcongress.org/ http://www.trifl.org/index.shtml http://homepage.mac.com/sukie/sukiesferretlinks.html all ferret topics: http://listserv.ferretmailinglist.org/archives/ferret-search.html [Posted in FML 6462]