The brooder box we built several years ago (instructions here) is terrific for babies when they are small, holding well over a hundred for several weeks. But when the young'uns begin to feather out, it's time to move them out and into a more spacious environment.
We made sure to trim one of each chicken's and turkey's wings to keep them grounded. If you trim both, they can still fly. Although the stall is mostly enclosed, there are some openings high on the walls, and we don't want the little rascals getting any ideas. Better safe than sorry, you know?
Below is the accompanying video of the process:
~ Tommy A.