We've had a huge decline in egg production. I had been attributing it to summer, to moulting, to lice or mites...but the weather's cooled, only a few girls seem to be moulting and they've gotten Ivermectin for the lice/mites. I've separated hens from roos today, but again, hardly any eggs by noon. There are plenty off nesting boxes. Any thoughts on what else to try? I'm concerned that this drop is due to something more serious.