I found this on the internet thanks to Millie. Millie had talked to Dr Murry and he mentioned Neovac DA2 so I checked out this brand of Neovac vaccine and this is what I found. NEOVAC® D is a high antigenic Mass vaccine that will override maternal antibodies, enabling for an earlier protection age. NEOVAC® D's stabilized formula is safe in that there is no shedding of the distemper virus. Studies have shown that NEOVAC® D is completely safe for not only Canines but Ferrets as well. Administer only one dose (1 mL) for initial vaccination of susceptible animals. Technical Specs: For use as an aid in the prevention of disease due to Canine Distemper Virus. NEOVAC® D is a high titer, modified live vaccine to be used where a moderate to severe threat of canine distemper exists. Ferret safety: Proven safe when administered to young ferrets. Debi Sadowski Fuzzy Loving Ferrets [Posted in FML 7067]