Does anybody know why chicks die in the egg at about day 15-18 ? My Broody hen who is a experienced super Mom, kicked some eggs out of her nest the other day. I marked them and put them back under her and she kicked them out again. I opened them up and two had un-developed chicks inside, they were dead. They had feathers and nails on their toes. The other egg was green inside. Does anybody know why they would die? I have never had this happen before. They are not eggs from my chickens.