Just saw that someone is supplementing that. Not a good idea. In ferrets and dogs too much can cause hypercalcemia. BTW, it also is not a good idea to megadose vitamins with a range of malignancy types because those cells are typically great at pulling up nutrients and in some malignancy types are better at it than normal cells. Another problem which can be encountered involves those using radiation therapy; some tumors can shield themselves if the person is taking a lot of Vitamin C. 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 6536]