Hi, I'm trying to figure out why my girls stopped laying. 1) We've had a lot of smoke from forest fires 2) I administered Tylan about 6 weeks ago for a couple of sick hens but gave to whole flock 3) I introduced 23 new chicks to the flock I know that the smoke, which is going away, and the addition of new girls can add stress. But, their behavior is normal, their poo is normal and they are eating and drinking well. Is it possible that the Tylan could have affected them negatively? Thanks in advance for any help or suggestions.