Ok, so we are newish to chickens. Done lots of research on this and cant figure out what this is. My chickens are sneezing, some have gunky noses. Thats how it begins. Some are fine, if they get lethargic, they die. I thought infectious bronchitis. Treated with Duramycin. For approx 2 weeks. Then some began pooping blood( some peeps about 3 or 4 days after moving outside). Then that got into my brooder. So did Corid treatment. Lost a few peeps. Now that the Corid is over, we are back to the sneezing. ***Sigh*** In total we are down about 14, 3 were adult hens, the rest peeps of various ages. My brooder is currently on Corid, treating these week old chicks. The rest of them are on Duramycin, round 2. Anyone got any ideas? I keep 3 different pens and the brooder. Is it possible I diagnosed correctly and its just making the rounds pen to pen? This is getting out of hand! Any help is appreciated! Thanks!