Jeanne and others: Originally, I never saw vomiting - I just saw the green slimey blob in the litter box. Then Dr. Williams told me that all the ferrets at AFIP vomited before coming down with the greenies. The BIG difference is that my ferrets are caged most of the time, sleep in bedding which absorbs most of the vomit, or it was lost in the litterbox or under the floor in the tray. AFIP ferrets had very few luxuries in order to maintain a sterile environment. So, I started watching. sure enough, a ferret would vomit, usually clear fluids, and then within 12 hours have green slimey poops. The vomiting seems to be a one day deal, irritating the throat as the virus irritates the intestines. Then the ferret feels lethargic after so much retching and may not eat much, then gets weaker.... I don't see every ferret vomit, but I'm now convinced it is the first sign... Pam [Posted in FML issue 1265]