I have a small flock of 1 rooster and 4 hens. Two of the hens were added to the flock a few weeks ago. At the time, I didn't know much about quarantining birds so didn't do it. My birds free range during the day and are locked up at night in a coop with an earth floor and a heat lamp for cold nights. Last week our rooster had a half-closed, watery eye that looked puffy. I assumed one of the new hens didn't like him getting friendly with them. (The two new hens should be laying in about a month.) A few days later, his eye looked fine. Today I noticed he is not crowing, is lethargic, his eye is half-closed and watery again, and his comb is turning black. The two older hens' combs are turning black too. The new hens seem fine. After reading on here most of the day, I decided to give them all Liquamycin 200 for 6 days and also spread DE in their pen for preventative measures. Is this enough? I had my son remove a trough from their coop that still had food in it that had gotten wet and they had pooped in. I think that may have contributed to whatever this is. Also, are the hens' eggs ok to eat during their antibiotic time?