Hope this is in the right board & hope I can explain my situation clearly enough. Had a good old fashioned brooding. The hen hatched the eggs that she laid. The chicks are now 5 weeks old Should I vaccinate for Mareks? I feed them medicated feed for the C. The mother hen was a hatchery chick & I imagine she was vaccinated. I will have to check on that from the feed store. Don't know if the mother's vaccinations make a difference or not. Thank you!