I, personally, do not have a belief in vaccinations of any kind, but everyone is different. There is a hatchery, can't remember which one now, that advises to NOT vaccinate if shipment of chickies is under 25 - I don't know the reasoning behind that. Mine are not vaccinated and will never be vaccinated; they are very healthy. Perhaps it all comes down to whether one believes in the power of pharmaceuticals or the power of nature. I'll vote nature.