CONSIDERATIONS TO KNOW ABOUT BIRD EGGS FOR SALE FOR HATCHING

because the chick develops you will see an increase in sizing of a pocket of air at the highest of the egg; That is called the air-sac and is also separated through the chick by a membrane. once the chick is due to hatch it breaks to the air-sac, this is referred to as internally pipped and gives the chick all over two days of oxygen before piping