Slaughterhouse closures spread after the cyberattack on meat producer Business and Economic News JBS SA’s cyberattack on the world’s largest meat producer has forced the closure of a number of slaughterhouses around the world, and there are signs that the closures are spreading. JBS’s five largest cattle factories, which handle 22,500 cattle a day, have suspended meat processing, Facebook company messages, workers and unions have reported following an attack on the company’s computer networks on Sunday. According to a trade group, killing operations in Australia had already been suspended and one of Canada’s largest beef plants was stopped on the second day on Tuesday.