Is likely to be deslorelin. Information on importing that is present in the past posts/ archives of the FML and FHL. See my addy lines for those URLs. They are easy to search and the applicable messages were within the last month or two. Gonadotropin Releasing Hormone vaccines (GnRH vaccines) are different. There are such vaccines for other animals which might work for ferrets, and there is some current work on developing one specifically for ferrets. 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 6426]