With high levels of Lasix ferrets do need potassium BUT too much potassium is also dangerous. Solution that works for most: banana! Solution that works for those who will not use banana and are getting high levels of Lasix: use SMALL (very small) amounts of Nusalt in occasional meals as directed by vet. Been there... (BTW, the banana we have found to have best acceptance w ferrets is slightly greenish fresh fruit and just let them nibble on it for a bit. We have also used banana yogurt when push came to shove.) Ferrets on low levels of Lasix are fine. 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/fhc/ http://www.ferretcongress.org/ http://www.trifl.org/index.shtml http://homepage.mac.com/sukie/sukiesferretlinks.html [Moderator's note: If your fuzzbean will eat it, I suggest Hass avocado. Not only is avocado higher in potassium but it's also high in fat, which is more easily digestible to ferrets. BIG] [Posted in FML 5801]