"On one covert video, farm workers illegally burn the ankles of Tennessee walking horses with chemicals. Another captures workers in Wyoming punching and kicking pigs and flinging piglets into the air. And at one of the country’s largest egg suppliers, a video shows hens caged alongside rotting bird corpses, while workers burn and snap off the beaks of young chicks."

"But a dozen or so state legislatures have had a different reaction: They proposed or enacted bills that would make it illegal to covertly videotape livestock farms, or apply for a job at one without disclosing ties to animal rights groups. They have also drafted measures to require such videos to be given to the authorities almost immediately, which activists say would thwart any meaningful undercover investigation of large factory farms.

Critics call them 'Ag-Gag' bills."

Richard A. Oppel Jr. reports for the New York Times April 6, 2013. [2]