I have a hen that has been doing wonderful and sitting her eggs and they r due to hatch on Saturday June 1st and she was fine earlier n we went down the coop just a little while ago and she was dead she had good water space everything she needed. Her head was purple and a ball of yellow gas came out of her. what happened? N also we have anther hen who is Broody and is sitting on two eggs so we moved the dead hens eggs over to her to save them. Will they still hatch?? Thanks yall!