Laws in Montana, Utah, North Dakota, Missouri, Kansas, Iowa and North Carolina have also made it illegal for activists to smuggle cameras into industrial animal operations. iStockphoto hide caption

itoggle caption iStockphoto

A Humane Society investigation of a Wyoming pig breeding facility to the introduction of an ag-gag bill in Wyoming, which eventually failed. Courtesy of Humane Society of the U.S. hide caption

itoggle caption Courtesy of Humane Society of the U.S.