Our Silkie is hatching chicks and I want to make sure that the babies are vaccinated the same as the rest of our flock. All of the other chickens come from a NPIP certified hatchery, are US pullorium-typhoid free, and received the Marek's Disease vaccine. The chicks are going to be fed Blue Seal Medicated Starter Feed, which contains amprolium, so we will not need to vaccinate for coccidiosis. Does anyone know where we can purchase the Marek's Disease Vaccination online? I was looking at Jeffers Pet online...has anyone had any experience purchasing from this retailer? Also, after purchasing this vaccine, how long is it good for? We are only treating a few chicks, but it says it contains 1000 doses..can we save it and use it for later hatches? What size syringe/needle should we use? Thanks so much for you help!