Four animal activists who took pictures of a large southwestern Utah hog farm have plead not guilty to charges filed under a controversial law that criminalizes undercover investigations of slaughterhouses and factory farms. The 4 from California and Maryland entered the pleas last week to charges of trespass and agricultural operation interference. They are the first to be prosecuted under Utah’s “ag-gag” law for allegedly taking photos of Circle Four Farms near Milford, Utah, and owned by Murphy-Brown LLC. – a subsidiary of Smithfield Foods Inc. Read more at Feedstuffs…