We are seriously considering adding to our flock, after we are done with the "pox" here. We want to avoid the kinds of problems chickens can have, if possible. I know there are vaccines our there, and I'm wondering which we should do, when, etc. Previously we have raised ducks and they seem immune to everything. In 10 years we have only had one duck die from disease, and that was a duck that kept having seizures. So....this chicken illness is new to me and I want to protect my birds, if possible. Is there a good guide, manual and/or book I can get, or perhaps a good website? We will probably add in the spring, so we have time to study!