Muzzle for geese fits over upper section of beak and has upwardly-projecting flaps at rear which restrict field of view of goose and reduce pecking between male geese, with consequent penis necrosis

摘要

The muzzle (1) for geese fits over the upper section of the beak. Flaps (3, 4) on the rear of the muzzle project upwards and restrict the field of view of the goose, reducing pecking between male geese and consequent penis necrosis.