chicikens and vaccinations
Hello everyone, I have a question about chickens and vaccinations. I hear so many opinions and read so many contradictory information that I would just like to hear some of the real life folks here and their practices and experiences.
I will admit my flock is a mixed lot; about half are hatchery born and therefore, mareks vaccinated... some others were hatched here or bought from fairs or shows etc; giving me no idea about their vaccination history.
I suppose my biggest question is if I suppose none of them have ever had any vaccine with the exception of mareks, then is it too late to introduce a vaccination plan? If , on the other hand, they did receive vaccines (at least those that were raised elsewhere), will it hurt to revaccinate?
Does anyone have a good schedule that works when hatching ? And also, a 'booster' program for adult birds? But most of all, would it be helpful or harmful to just vaccinate them all this Spring with all the things that they should have been as chicks? Is there withdrawal time for eggs after vaccinating?
I know this is a lot of questions and perhaps does not make much sense to some of you but we have lost 3 chickens this winter......otherwise healthy birds, just dead in the morning.... no respiratory condition noticed.... now please do not turn this message into all kinds of advice about how to treat disease or the need for necropsy ..... that is not my question.... I simply want to know about vaccinations.... thank you for your reply.......