The slaughter of poultry differs from the slaughter of all other meat-
producing animals in that the live birds are hung upside down in shack
les prior to slaughter. There is concern from animal welfare organizat
ions such as the United Kingdom Farm Animal Welfare Council that this
practice, although necessary for present methods of humane slaughter,
causes possible distress and pain to the birds. This paper reviews the
regulations on the provision for the welfare of poultry at slaughter
as it affects shackling, the equipment involved in shackling, and the
physiological and psychological effect of shackling on birds.