Two weeks ago I found one of my pullets roosting on top of the coop alone, gasping, and all puffed up. I was given amoxicillin by a vet, but she still passed away. A second pullet began gasping, and the vet gave me tylan 100 and panacur to be given for 6 days. My flock finished their course of meds a week or so ago, all of them fine. Yesterday, I found a pullet gasping very slightly. I put her in isolation. She's not eating, will drink very little on her own. She stands with her eyes closed most of the time, and can only open them a little. She feels strong still, she just obviously feels awful. She coughs, but I haven't heard sneezing. I can hear some rattly-mucousy stuff. I don't see any discharge. All of this crap is making the rounds through the 4 month old or so birds. The older hens and roosters are fine, the ducks are fine. I can't afford the test to find out for sure what my birds have, but maybe someone on here has been through the same thing, and can offer advice. Maybe even encouragement. Because I am SAD, y'all. SAD. I'm afraid that I'll lose all of my young birds, and they really are so much sushine for me. Anyway, my questions: Is that tylan 100 even a good idea? I mean, I'm doing it a second time for a little hen, and I am almost sure I shouldn't have because maybe I am making a super disease or something, but I was in a panic. I want to save her. Is all hope for a healthy flock lost? If the worst happens, and I lose my whole flock, will I ever be able to have chickens again? Or is it likely that there is some evil, undying virus/bacteria/devil all over my property just WAITING for happy little chickens? Is there anything I can do to help the symptomatic bird in addition to the antibiotics? Oh, please help.