An at least partially floorless semirigid poultry enclosure configured to flex and/or adjust to accommodate undulating terrain during movement across a field. The semirigid poultry enclosure may comprise a semirigid foundation. The semirigid foundation may include one or more flexible portions disposed between two or more rigid structural elements. The semirigid poultry enclosure may include an automated movement system configured to facilitate movement of the semirigid poultry enclosure on a field. The automated movement system may be configured to move a semirigid poultry enclosure that is at least 90 feet in length via multiple drive units coupled to a semirigid foundation.