Abstract: A livestock enclosure for a pickup truck or the like comprises two foldable rack structures, one for each side wall of the truck body, the structures terminating at the rear of the truck. The racks are collapsible against a vertical head board at the front of the truck body. Locking pins are provided to secure the rack to the wall of the truck. The rear gates may be swung open and if the truck is too close to a cattle chute or other structure, the gates may be opened by lateral movement. A locking bar holds the rack structure in position at the rear of the truck and also is employed to retain the rack in its collapsed position against the cab.