I am confused regarding heartworm preventative for my ferrets. Much of my confusion stems from my vet telling me that even though the prevelance or heartworm infection is relatively high in our area (ST. Louis, MO), she rather not give ivermectin (sp?) to ferrets because there have been no tests regarding its safety. However, I know that Dr. Williams strongly recommends heartworm preventative. Is there another preventative? Is ivermectin (sp?) safe? If so what dose? Also, I recently spoke to a ferret breeder who raised concerns over the green msytery virus spreading West. She stated that there have recently been cases in Chicago. Does anyone know where the original outbreaks of the greem virus were located? How long ago? Does the virus seem to be spreading West? If so, where has recent activity been reported? Thank you, Pat, Deb, Salome, Percephone, and Jezebel :) [Posted in FML issue 1217]