My husband and I currently have 6 black australorp chicks and we are planning on getting 4 buff orpington chicks next week. My question is: at what age can we introduce the new chicks to the older chicks (well chickens at that point) and do you have any tips on how to introduce them to reduce chances of fighting? The coop should be done this weekend so we're planning on putting the australrops outside, but keeping the buff's inside until they have their feathers (about 5 weeks). Any thoughts/advice?