We have learned a lesson the hard way. We have a small flock of 12. Being new to chicken keeping we introduced 3 new hens (from "trade day") into our flock, and a few weeks later all my chickens (except for 2 of the new girls) have ALL the signs & symptoms of infectious coryza. After doing some research on coryza, my husband & I are thinking that the best decision is to cull the flock & start over with day old chicks from a reputable hatchery. I have a few questions: 1-Does this sound like an unreasonable thing to do? 2-What is the easiest & most humane way to cull? ( We have NEVER killed an animal, but if it's what needs to be done, we certainly don't want to cause suffering) 3-If we do end up culling the flock, any suggestions on where to order chicks from? 4-How long should we wait to repopulate & how should we decontaminate? Any information or suggestions would be much appreciated! Thanks in advanced!