So- I have 2 flocks. I have one that are 20 weeks and one that are 8 weeks. The last 2 weeks they have been open together in the same yard space- but they pretty much do not mingle at all. The small ones sleep in different space and stay in the fenced in coop area and the larger ones free range all day. At first the larger ones pecked the babies and chased them- now they will chase them- but mostly the little ones have figured out to just run when they see the large ones. My issue is.... We just built a winter coop today!!! YEAH!!! I have put the babies in there (as their coop did not have a perch and was more prone to predators). But, here soon I have to co-mingle the flocks nightly. We live in NE Michigan and it will get cold here soon and I will have to make sure they are all safe and warm. So- how do I do this without the larger ones killing my babies? I do have 2 larger roos and at least 1 roo in the babies. Total of 18 chickens. Thanks!