Totally new to chickens and was wondering how the broody thing works. Does the hen start sitting on the nest and then begin laying eggs. If she lays only one egg a day, does she start sitting on the first one and if not, how do I know it is an egg she plans to hatch? How many eggs are usually laid for one hatching and how many days apart from the first to last hatched egg? Since I only have two nest boxes for four hens should I provide another nest box while the hen is on her eggs? Sorry for all the questions, but I though it would be better to know a little before hand.