tried to search this, just a quick question. I (stupid me) brought in a sick bird not knowing about a year ago. Narrowed it down to coryza.... It slowly creeps throught the flock and I SADLY have culled every bird once they get to the stinky snot... Everyone has fresh chicken breath now and there is no sneezing. Ofcourse they've been with the sick birds. They are from 9 months to 4 years old now. About 30 of them. What to do? Would it help to run the antibiotic through the remaining? Don't have the name on me now, but it is actually a med for treating coryza. Should I just do it, then only raise babies out of what I have now? I plan to never sell or buy birds from anywhere again. Just day olds from hatcheries. thanks