Valgus-varus deformity of the intertarsal joint in broiler chickens.

A lateral or medial angulation of the shaft of the distal tibiotarsal bone resulting in deviation of the lower part of the leg and frequently with bending of the proximal shaft of the tarsometatarsus is the most common leg deformity in broiler chickens. This lateral or medial deviation of the legs in broiler chickens, which has been described by many workers, deserves a specific name such as angular bone deformity or valgus-varus deformity of intertarsal joint, so that it may be separated from other varieties of lameness in broilers.