It is still cold, 15 degrees F tonight, and will be cold while my Buff Orpington broods eggs and chicks. She is a big chicken. How many eggs would you let her sit on? I have around 12 under her right now. She just started sitting today. I figure some of the 12 eggs won't hatch, what do you think? This is only my second broody hatch. I have eggs hatching in my incubator on Friday. and I have to do another hatch the first of April.