meaning how long should i leave my girls, who get to free range,in the coop to see if they are maybe laying. they are showing some signs and i added a nest box,so far nothing. is there a certain time that if they are going to lay,they would be done and then i could let them out? for all i know they could be laying eggs and id never find them! the favorite place for the chickens to hang out is a old barn with lots of stuff grown up around it and id never see an egg in there!!