I'm about to put my year old hens back with my rooster, I have 2 blue Orpington and one australorp pullet. When is the earliest I can put the younger pullets with my rooster? On the one hand I'm worried he will hurt them but on the other, waiting May rock the boat with the pecking order. The two orpington pullets are bigger than my grown australorp hens but I know their bones are still growing. They are 9 weeks old.