One of my reds has been occasionally coughing/sneezing (can't tell what that sound is). It's been going on one week. Other than that, she acts fine. I haven't removed her from the flock (two other red sex links, two Light Brahmas, and two Japanese bantams); don't really have a good place to put her, and by now the other six would have been exposed. And none are showing any symptoms. Could it be allergies? A cold? Her "nose" occasionally runs. She eats, drinks, runs, lays eggs like normal, though. When my daughter (a vet tech student) listened to her breathing through a stethoscope, it seemed clear. What could it be, and what should I do? I'm brooding six more chicks in the garage and don't dare expose them to whatever... Has anyone had a similar experience?