Good Morning, I have 9 RIR pullets that I got as day olds in late August and 3 Buffs, 2 pullets, & 1 cockerel that I got from PurpleChicken in early October. The Buffs have been in the coop with the Reds for about 3 weeks now. I guess it's natural but the Reds frequently pick on the little Buffs. I have box in the coop with a wire opening only big enough to let the Buffs in and out. I just strung mason's line on my run so I can safely (fingers crossed) let everyone range during the day but the two breed definitely don't mix. I am anxiously looking forward til when the Buff roo is big and old enough to "assert" himself and even out the balance of power in our coop. When will roos typically begin to crow and act like roos act ?? Here are some pics and also a pic of the plexi window setup I just put in place last week. The coop is unheated and not insulated (yet) but just covering the windows has made a significant different in the coop temps I encounter in the morning when I go to run out fresh water.