We are a small flock and a wide variety of chicks from silkies, wyandottes, rhode islands, polish, frizzles and we think some cross breeds that no one is really sure of yet. Anyway we have gotten most from a local auction and of course you can never tell what you are getting. We have had some that got bubbles in eyes and runny noses, tried many things and finally we keep a bottle of tylan on hand and do one time a day for three days in sub q when we see symptons. My concern is having to do this repeatedly, chickens getting sick then well then sick etc and what can be done for this? Is there a general vaccine that I can get and give to all my chicks and any new ones I get in the future or do you have to vaccine for specific illness?? Thanks for your help..