The Downed Animal Protection Act ; Humane Methods of Poultry Slaughter Act ; the Meat and Poultry Products Inspection Amendments of 1993 : hearing before the Subcommittee on Livestock of the Committee on Agriculture, House of Representatives, One Hundred Third Congress, second session on H.R. 559, H.R. 649, H.R. 3646, September 28, 1994