A mobile livestock handling apparatus comprising: a chassis having a front end and opposing rear end spaced apart in a longitudinal direction; a foldable force tub carried on said chassis at a rearmost section thereof nearest the rear end of said chassis, said foldable force tube comprising a plurality of arc-shaped walls (50, 52, 54), including: a first arc-shaped wall panel having a first proximal end, a first distal end opposite thereto, and a first pivotal connection pivotally coupling the first proximal end of the first arc-shaped wall panel to the chassis for swinging movement of the first arc-shaped wall panel about a first upright pivot axis (A 1), said first arc-shaped wall panel being pivotable about said first upright pivot axis (A 1) between a first deployed position spanning laterally outward from the chassis and a first stowed position of lesser lateral extent from said chassis; and a second arc-shaped wall panel having a second proximal end, a second distal end opposite thereto, and a second pivotal connection pivotally coupling the second proximal end of the second arc-shaped wall panel to the first distal end of the first arc-shaped wall panel for swinging movement of said second arc-shaped wall panel relative to said first arc-shaped wall panel about a second upright pivot axis (A 2), said second arc-shaped wall panel being pivotable about said second upright pivot axis (A 2) between a second deployed position forming an arcuate extension of the first arc shaped wall panel from the first distal end thereof, and a second stowed position folded alongside said first arc-shaped wall panel and reaching back toward the first proximal end thereof characterized in that: the chassis comprises a shorter first side and a longer second side, of which the longer second side defines the rear end of the chassis, and the first pivotal connection between the first arc-shaped wall panel and the chassis is situated at said shorter first side thereof. a chassis having a front end and opposing rear end spaced apart in a longitudinal direction; a foldable force tub carried on said chassis at a rearmost section thereof nearest the rear end of said chassis, said foldable force tube comprising a plurality of arc-shaped walls (50, 52, 54), including: a first arc-shaped wall panel having a first proximal end, a first distal end opposite thereto, and a first pivotal connection pivotally coupling the first proximal end of the first arc-shaped wall panel to the chassis for swinging movement of the first arc-shaped wall panel about a first upright pivot axis (A 1), said first arc-shaped wall panel being pivotable about said first upright pivot axis (A 1) between a first deployed position spanning laterally outward from the chassis and a first stowed position of lesser lateral extent from said chassis; and a second arc-shaped wall panel having a second proximal end, a second distal end opposite thereto, and a second pivotal connection pivotally coupling the second proximal end of the second arc-shaped wall panel to the first distal end of the first arc-shaped wall panel for swinging movement of said second arc-shaped wall panel relative to said first arc-shaped wall panel about a second upright pivot axis (A 2), said second arc-shaped wall panel being pivotable about said second upright pivot axis (A 2) between a second deployed position forming an arcuate extension of the first arc shaped wall panel from the first distal end thereof, and a second stowed position folded alongside said first arc-shaped wall panel and reaching back toward the first proximal end thereof characterized in that: the chassis comprises a shorter first side and a longer second side, of which the longer second side defines the rear end of the chassis, and the first pivotal connection between the first arc-shaped wall panel and the chassis is situated at said shorter first side thereof. a first arc-shaped wall panel having a first proximal end, a first distal end opposite thereto, and a first pivotal connection pivotally coupling the first proximal end of the first arc-shaped wall panel to the chassis for swinging movement of the first arc-shaped wall panel about a first upright pivot axis (A 1), said first arc-shaped wall panel being pivotable about said first upright pivot axis (A 1) between a first deployed position spanning laterally outward from the chassis and a first stowed position of lesser lateral extent from said chassis; and a second arc-shaped wall panel having a second proximal end, a second distal end opposite thereto, and a second pivotal connection pivotally coupling the second proximal end of the second arc-shaped wall panel to the first distal end of the first arc-shaped wall panel for swinging movement of said second arc-shaped wall panel relative to said first arc-shaped wall panel about a second upright pivot axis (A 2), said second arc-shaped wall panel being pivotable about said second upright pivot axis (A 2) between a second deployed position forming an arcuate extension of the first arc shaped wall panel from the first distal end thereof, and a second stowed position folded alongside said first arc-shaped wall panel and reaching back toward the first proximal end thereof characterized in that: the chassis comprises a shorter first side and a longer second side, of which the longer second side defines the rear end of the chassis, and the first pivotal connection between the first arc-shaped wall panel and the chassis is situated at said shorter first side thereof.