My kids have been telling me that we have a hen that has not left the nest box .. on the first day my daughter who is 7 actually picked her up out of the box brought her to me INSIDE and told me she was sick.. i said she is fine put her down and leave her alone. Ok so she has been in the box 4 days and has 3 eggs under her.. I know she will do a very good job she is my fluffy cochin so I am not worried about the cold for the babies or anything like that.. BUT #1 How do I figure time? How long will it be? #2 They may not be fertill.. we have a roo but I check their eggs when we eat them and some are many are not.. I would say 40% to 60% fertill. Does she know if they are fertill or not? #3 she is my least developed of my cochins.. She must have just started laying.. All the others have much larger waddels and combs.. Hers is small and red.. And her eyes are RED.. I am not kidding.. she gets all fluffed up and irritated when we come in at her.. But the colored part of her eyes that is normally hay colored are red... So I am totally new at this.. I mail ordered my chicks.. But I totally wanted an incubator and I got one.. Now I need help figuring out the details..