Hi all! I am almost a new 'mommy' getting ready for my chicks to come. I have a question, I'm getting 5 Silkies from, my pet chicken, and they don't vaccinate bantams. I have 3 chickens coming from Murray Mcmurray that will be vaccinated. My pet chicken told me I could vaccinate them after a week or two, because they are so small. Is it ok to give them Mareks vaccine at that age? Thanks so much. Kim