While designing my new coop, I've started wondering if I can build one coop that can house both 5-10 week old chicks and adults. It seems there are 3 age groups, each with their own needs: 1. 4-6 week old chicks. They need special heated and protected cages. 2. 5 to about 10+ week olds. They don't need the heat, but they need to be protected from adult birds. 3. 10 weeks and higher. If the chicks are big enough, they can generally work their way into the pecking order and join the general flock. It would be nice to keep #2 and #3 in the same structure, but I don't see a convenient way to do it.