What vaccinations do you give your chickens? When? How? Why? How often? I have no vaccination schedule for my chickens as of yet. Had never even heard of a thing for the chickens until I read about chicken pox on this board. I do live near a creek and since I'm in SE North Carolina, mosquitoes are numerous a good part of the year. My horse is vaccinated for E/W enceph... and West Nile as well all of his other shots. What do I need to vaccinate the chickens for? Thanks for the input!