I have 4 broody chickens and I thought the eggs the were sitting on were not fertile, since I only had one young rooster. Well I candled the eggs and most are fertile! however I think they should have hatched 4 days ago! I think some chickens kept adding eggs to the piles but the first eggs should have hatched 4 days ago. How long do I wait? What can I do to check if they will hatch. This one poor chicken has been sitting about 2 months altogether. (the first month was on non fertile eggs that I removed). How long can she sit there? AND What do I do if one does hatch? Do I isolate the chicks from the other chickens? I have no idea what I am doing.