she'll be inclined to keep the chick in the penned area for the first few days to a week. my own house coop and for my broody is 4 feet long by 2 feet wide. This gives her enough room to have a nest, food and water and an area to broody poop! In another week or so she and the babies will have access to the outdoors through a chickie door and ramp to another penned area approximately 3 by 3. this is my first time doing the penned off area. Previously I had kept them in the house. However the integration back into the flock is a pain. I found myself having to bring the hen and babies or just the babies because the moms gave up, outside everyday for hours. takes up a lot of time as the babies were not acclimatized to the weather and surroundings. this time I am trying to leave the babies with the mom and hopefully she won't go broody again a few weeks later!