I am curious about giving vitamins to my chickens to help maintain their health. Curious what others do/use or even think about the idea. As some of you may have read in another post, I vaccinated my birds and they are taking on the symptoms of what I vaccinated them for. None have died, but are definitely affected. If I am lucky enough to save them, I feel that their immune systems probably need a kick start. I'd just like to know if people regularly give vitamins and minerals to their chickens and how do they do it, how often, what they use and how it is administered. I have a relatively large flock of about 50 chickens of various breeds.