Dear everyone, I have lost half of my flock to CRD, before I finally came across the right information: Tylan. I gave it to my birds when the illness was affecting almost all of them. Some still died, but the rest managed to make it into adulthood (10). Now, three months past, all seems fine but my number two cockerel is coughing again. What shall I do? - Medicate the entire flock again? - Take him apart and medicate just him? - For how long? - What about the eggs that are being laid? Are they good for eating/hatching if the hens take the medication? Plus, this poor boy is not putting on any weight or showing any sign of smartness... I suppose CRD can delay a chick's development, right? I'm at my wit's end... Help!!