Hello.. my hen layed 3 eggs in her nest.. two of the chicks have been hatched for about 3 days now... the last egg hatched and the sack is still fairly large .. there is no bleeding. and the chick is peeping and moving a bit . I have him on a heating pad because I do not have an incubator .. I do not know if I just keep it warm and wait.. or do I need to keep the Sack wet.. does it need to dry up.. it still looks preaty full... I know he might not live but I have to try..