I have candled before but it was last year and forgot.... But we have a broody hen and one young roo and we just let her sit on the eggs cause we didnt think they were fertile... well I candled them a few days ago and in 6 of the eggs I saw like all black and an air cell .... When should they hatch I dated the eggs when they were layed just incase and some were laid 2/5 - 2/8 so when should they hatch?