I'm wondering if a pen to seperate my two month old chicks from my adult birds is even going to be necessary. Here's my current setup - the adult birds coop is in the garden area, which is outside the fenced yard. My adult birds free range all day, but can no longer slip through the slots in the fence to enter the yard. Other than that, they go where they please. The chicks are currently still housed in the yard. They run around mainly in the yard, but do slip through the fence to forage around the perimeter of the yard. They haven't ventured into the garden area, yet. The adult birds are aware of the chicks and vice versa. There's been some pretty funny standoffs when an adult bird and a chick both end up under the same vehicle, tractor, what-have-you, looking for bugs. They stop and stare and then one of them ends up running away, almost always it's one of the big birds that flees first. My adult rooster has watched the chicks through the fence quite a few times. I expected him to crow or otherwise claim his dominance of the farm, but he doesn't. He'll flap his wings (an action I've learned he does when he's nervous) and then walk away. Right now it seems like the adult birds just want to ignore the chicks as much as possible. Now for the dilemma. Soon the chicks coop will be right next to the adult birds coop in the garden. We have intended to create a temporary pen around their coop until they've been around the adults for awhile and have some size on them. A pen is going to be a hassle. It will have to have a top, since these little ones are great flyers. Also, they are already used to free ranging every day and I'm sure they aren't going to like the confinment of a pen. There's plenty of places for the babies to hide. I'm wondering if a pen is even really necessary considering they've been exposed to each other, have seen each other for about a month now and the adults are not acting aggressive in any way. My biggest concern is that my adult roo is not going to be pleased that I have a few cockerels in the baby flock. I'm just not sure what to do.