Hi all, I made the mistake of bringing a commercial hen into my flock. It seems she spread IB, and lost some chicks. The adults wheezed a lot but did not die. However they have almost all stopped laying. Now some are moulting, my question is if they will come back into lay eventually or should I cull? Second Q is can I bring in new hens into some coops while I phase out the ones that are not laying? I have culled the commercial bird so I am not sure if I am still carrying IB or not. Thanks for all help.