Death on a Factory Farm (2009)

Death on a Factory Farm follows the undercover investigation of Wiles Hog Farm by the animal rights group: The Humane Farming Association (HFA), and the resulting court case against it. The organization received a tip from an employee at the farm that animals were being abused, including a claim that hogs were being hung by chains and strangled to death as a form of euthanasia. HFA then turned to an undercover investigator going by the name "Pete." The investigator wore a hidden camera while he worked undercover as a farmhand at Wiles. Over the course of six weeks, the investigator secretly filmed numerous incriminating scenes, including piglets being tossed into crates from across a room, impregnated sows held in pens impeded their ability to move, an unhealthy piglet being hit against a wall to euthanize it, and a sick sow being hung by a chain from a forklift until it choked to death.

trailer:

IMDb