Well i may have just infected some of my flock with something. I bought a pullet a few days ago who looks perfectly healthy but 3 days later when i feed the chickens i noticed that a couple of roos had swolen eyes and they have a rattle when they are breathing. They have also stopped eating. This morning it looks like one of the hens has the same symptoms. Any ideas on what it might be and what i should do? I am thinking it could be infectious broncitis(sp), but i really don't know. They are all younger birds approx 4 months old.