I have 3 different age groups of chicks... and 9 babies coming in June. I currently have 2 groups in the coop... not in the run yet, as they haven't been in the coop long enough to know it as 'home' and our run isn't quite finished. I have an introduction pen in the coop with the younger of the 2 groups in it. They are separated only by nylon chicken wire. No issues. Here's the breakdown of the scenario: Group 1 - 8 1/2 weeks old 5 Isa Browns and 6 Cornish Cross (who will be dispatched soon) - have been in the coop 1 1/2 weeks. Group 2 - 6 1/2 weeks old 5 Silkies, str run, 2 Barred Rock pullets and 2 Silver Lace Wyandotte pullets - have been in the coop < 1 week Group 3 - 3 1/2 weeks old - still dirtying up my craft room in indoor brooder 12 Buff Orpingtons, str run So, group 1 and 2 are in the coop.. separated by nylon chicken wire. When can I start introductions? I plan on maybe getting some of group 2 out of the intro pen and letting them mingle with the others, closely supervised. Should I wait until the Cornish Cross are gone to do this, or does it really matter? I'd LOVE to put group 3 in the coop as well. I have room in the intro pen to divide it in half. With the nylon chicken wire.. so all 3 groups would be able to see each other. And I'd really like to brood the June batch in the coop.. in the intro pen. It'll be quite warm by then, so little supplemental heat will be needed. What is the best way to go about this? And once my run is complete, could I put groups 1 and 2 out for some outside time together, even if they are still separated in the coop? My coop is 10 x 20 and my run is 20 x 60. Thanks in advance!!