In our experience over the past ten years as a shelter, over the counter (pet store) flea products are not safe for ferrets. The drops that go on the shoulder can be found in most pet product departments, but often cause allergic reaction in ferrets. This is not true of similar products which can only be purchased through a veterinarian. These include Program, Advantage and Revolution. We have used both Program and Advantage extensively with excellent results and no negative reaction. We have not used Revolution but know that it has been tested on ferrets by the manufacturer. At this time, it is not officially sanctioned, so caution is advised. Only veterinarian-dispensed flea products are suggested for ferrets as they are consistent in strength and come with complete instructions on their use. Over the counter flea products are notorious for their adverse effects on ferrets and young animals such as kittens and puppies. As a vet tech, I have seen both kittens and ferrets dies after having been accidentially overdosed with Hartz products in particular. Veterinary flea products come in small containers which help to avoid overdosing. More important, veterinary flea products come with the professional advice of your vet. Pet owners often dispair of flea infestation and apply a heavy, and possibly fatal, dose of a strong flea product. One of the many disadvantages of Lupron in the treatment of adrenal disease is that it may not be effective in the treatment of other serious illnesses related to adrenal disease. Case in point is the suspected prostate cyst which can interrupt urine flow. Yesterday's post reported the death of a ferret from this secondary infection, after having apparently recovered from adrenal disease through the use of Lupron. Another such disease is insulinoma and both of these are commonly seen in conjunction with adrenal disease. If these secondary illnesses are observed during adrenal gland surgery, effective treatment can be initiated. Ferret owners who select Lupron instead of surgical removal of the adrenal gland(s) need to be aware that leaving the tumor(s) in place can result in death due to these secondary illnesses, even if the adrenal disease is supressed. C. Kinsey, Ferret Rescue of the Western States, Colorado Springs [Posted in FML issue 3137]