I have seen many posts that say to wait until chicks are 12 or more weeks old to add them to a flock. If we let a hen go broody and hatch some eggs why is there a problem? I would think years ago on farms there were chickens of all ages in a flock. Perhaps because the flock was basically free range years ago so minimal interaction among age groups? Really don't want to have nor do we have room for a seperate coop and run areas for the younguns'.