Did the ferret have raisins, grapes or currants? Each of those has caused acute kidney failure. Animals with problems from such food items are ferrets, dogs, and cats. Most of the documentation is in dogs, but "Ferrets Magazine" had an excellent article by two vets who have treated it in ferrets who were almost killed by raisins. (Remember that ferrets DO stash things so a ferret can have a raisin stash and then one day eat it, going over any safe amount. It may be that as few as 7 raisins could be too much for some mid-sized adult ferrets. One thing also under consideration is that some ferrets might have an increased genetic vulnerability to this risk.) Good luck. We have had a ferret who survived life-threatening kidney problems three times. It can be a long haul and lots and lots and lots of fluid becomes important for an extended period. We much that is good to say about IV and about sub-cutaneous fluids as well as oral. 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 "All hail the procrastinators for they shall rule the world tomorrow." (2010, Steve Crandall) On change for its own sake: "You can go really fast if you just jump off the cliff." (2010, Steve Crandall) [Posted in FML 6837]