We just purchased 10 new chicks to add to our "flock". We have the chicks in their own coop for now, but they are about 1 week to 4 weeks old per the feed store. Our "big chicks" are about 8-10 weeks old. 2 are "ladies" and we have 2 that just started crowing last week. Since our older chicks aren't full grown, when would be the best time to introduce everyone safely? Also, why are they so addicting?? I want 2 of every kind of chick!!!