Reuters reports that Tyson Foods Inc., the largest U.S. meat producer, reduced production for one day on April 10 in response to poor market conditions and to concerns a nationwide immigration rally set for that day could affect attendance by its Hispanic workers. The meat industry relies heavily on immigrant workers to staff production facilities, and a large percentage of those workers are Hispanic. The rally advocating national immigration reform could affect their attendance that day. The market conditions were not specified, but food industry analysts and meat companies have said there is an abundance of meat. Bird flu overseas is partly to blame because it has hurt exports of U.S. chicken and that meat is piling up here. Tyson said about 30 percent of its work force is Hispanic. Other U.S. meat companies either said they were aware of the rally or declined to comment about it.