I had a couple of Silkies that had one eye swollen like the one in the picture below that was emitting a foul odor. After searching the forum and web I came to the solution that I have Infectious Coryza in my flock. I already cull those Silkies and also a couple of other that showed signs of having it that also had a foul odor from the nasal/ eye area as soon as I realized what it was because I was afraid it might affect the rest of them. What I am afraid of , which is probably true, is that it already spread beyond repair because I still smelled that nasty odor. The chicken(s) who I think my chicks got it from I had gotten them through Craigslist go figure. My questions are do I cull all the 3 month olds or just keep killing off all the ones who show symptoms of having it? Or should I treat them with Albon, Di-Methox, Sulfa-Max, SulfaSure, gallimycin, Aureomycin? However they will remain carrier for Infectious Coryza even after they are cured. Do I want to put possible future chicks at risk? I was planning on doing another round of raising days old next year. I am so distraught about making that decision because this is my first time raising chicken from babies! Any advices or recommendations is greatly needed.