What if other birds are not showing symptoms. Would that be bacterial infection? How long does a hen live if it has pneumonia? Wouldn't other hens have it after a week or so? One of my birds has a gurgling sound when I stroke her neck. She sneezes, don't think it's a caugh. IT is too late and pointless to quarantine at this point. The other chickens are bound to have been infected. Thinking all the hens would catch "it" I treated the whole flock, 5 birds, with antibiotics Tetracycline. I had the water out for 2 days then replaced it with a probiotic water. The one hen still seems to sneeze and has a runny nose. The others seem fine. The sneezing hen eats poops drinks is normal except her sneeze. Any suggestions on what to do now?