It started with one small chick who got a runny nose and watery eyes. She sleeps in a giant dog crate in the garage with a few other chicks. Now two of my adult birds have it. The adults stay in the coop, but free range during the day. The small chick is so "dry" feeling.. she is wasting away it seems. One eye is now matted shut. The adult chickens sound raspy. I bought some tetracycline(sp) and have it in the water, but they don't seem to be drinking it. Should I go get some of that Tylan 50 and inject it? Does anyone have any suggestions at what I am dealing with here?