The stall (G) has a nest box (20) provided in an inner chamber of an enclosure (10) and consisting of a light-proof material. A nest chamber consists of a light-proof material arranged under the nest box, and is formed as an elongated rectangular transport box (30) including an upper side opening that is separated from the nest box and enclosure. The transport box includes a retainer for a cover that closes the upper side opening, and the retainer is formed in such a manner that the cover is suspended on the transport box.
