Hello everyone. Long time lurker, 2nd time poster. I'm very new to all of this, and I have read everything I can find about this topic. I have a few questions that I hope your expertise and experience can help me with. I've received two separate orders of 4-week-old chicks. The orders were 3 weeks apart. Five of the chicks are now 9-weeks old (had them for 5 weeks), and three of them are now 6-weeks old (had them for 2 weeks). The younger ones are still quarantined to my garage in a small coop, and I had planned on keeping them quarantined for another 2 weeks, then migrate their small coop/run near to my large coop/run so that they could get used to each other but not touch each other. My confusion: - I'm supposed to keep the young'uns quarantined for 30 days, but I've read that if I got them from a reputable hatchery, I don't need to do that. I got all 8 of them from the same hatchery, and they are supposed to have all been vaccinated for the same things. - I'm supposed to keep them separated until the youngest ones are big enough to defend themselves, but the older ones are still growing too. It will be a long time until they are all full grown. - It will soon be winter where I live, and if I don't get the young'uns out of my garage and into the COOL weather soon, they will have a tough time of it once the COLD weather gets here. Their small coop is not insulated and only has a small heat lamp. The big coop is insulated and draftproof, and is much more suitable for our winters. Does the fact that my "oldest" chicks are still so young and not very much bigger than my "youngest" chicks change the rules about how long to wait to introduce them? Seems like maybe since they are all so young they may have significantly different dynamics to their introductions, as opposed to introducing young chicks to mature laying hens. It almost seems like the longer I wait, the even more-difficult it may be due to the older chicks getting closer to laying age, and I'd hate to do this in the dead of winter (Dec-Jan). Not that it should matter, but the older chicks are 3 BOs and 2 Red Stars; and the 3 younger chicks are BAs (although two of them look like Speckled Sussex or Barred Rock chicks). I'm sure I've totally overthinked/overthunk this whole thing. How would you go about introducing them? How much longer to quarantine? How much longer would you wait before letting them sleep together? Any advice from your experiences would be very much appreciated!