I've been searching for the answer to this question but have not found an answer so thought I would just ask. I have an incubator with an air circulating fan (farm innovators). Last time I hatched out chicks, I left the fan on during lockdown and hatch. Was I suppose to unplug the fan during lockdown and hatch and have it be a still air incubator during those last days? Thank you. Monday is lockdown day.......excited. Homicidal broody hatched out roos and pullets, but killed ALL 4 of the pullets and ate two of the eggs, she let 3 cockerels live..... The other broody who is very good, hatched out one pullet and 4 cockerels. I'm hatching Cream Legbars. I'm hoping the incubator give me some pullets.