Dr. Oka - While the vaccine that you discussed with me, Dohybac Distemper is most likely safe for ferrets, and is similar to what we were using in ferrets as recently as 5 years ago in this county - we have now several good vaccines, and one that is apporved for use in ferrets. Personally, I prefer not to inoculate ferets against unnecessary diseases, such as parvo. parainfluenza, etc. We already know that ferrets have trouble with an injected protein load, so I try to burden their immune systems as little as possible. You might try the Solvay Galaxy-D or some of the monvalent vaccines for distemper in dogs (without the parvo, lepto, hepatitis, etc.) While you probably won't run into a lot of trouble with the Dohybac, there appears to be better alternatives available... Bruce Williams, DVM [log in to unmask] OR [log in to unmask] Bruce Williams, DVM, DACVP Department of Veterinary Pathology [log in to unmask] Armed Forces Institute of Pathology [log in to unmask] Washington, D.C. 20306-6000 (202) 782-2600/2602 [Posted in FML issue 1193]