The FSIS-New Swine Inspection System (NSIS) allows higher than conventional line speeds in six hog plants. After two years the USDA has agreed to extend the trial for an additional 90-days to gather data. It is estimated that collectively 40 percent of the Nation’s hogs are within 100 miles of one of the six plants operating under the NSIS.
High-speed slaughter facilitated through the NSIS has improved efficiency and reduced cost of packing. In a competitive market, savings are generally passed on to consumers. Following litigation a Federal district court capped line speed at 1,106 head per hour in 2021. In practice with suitable equipment this rate can be exceeded without compromising either worker welfare of food safety
Enhanced line speeds are vigorously opposed by both worker’s unions and animal welfare activists. These entities are following their specific parochial interests. Unions are concerned over maximizing head-count and membership. Animal Rights Activists will use any issue including food safety to reduce the profitability and strength of intensive livestock production, irrespective of the outcome or cost to stakeholders.