The little wooden box was a little indoor coop that had one open side they went into at night. We took it off once they were integrated into the older group.
For our last 4 chicks that we got in April 2020, we did something similar. We live in SW Missouri where spring can be unsettled but where it can get quite warm. As they outgrew their indoor brooder my husband decided to build a portable coop-run to use for the chicks as they grew and then in our...