Horrifying undercover footage from inside a Californian slaughterhouse shows incompetent workers standing on the mouth and nostrils of a cow to suffocate it after failing to kill the animal with a bolt-gun.
The shocking video, which allegedly demonstrates rampant animal abuse and suffering from inside Central Valley Meat Co., has led the the U.S. Department of Agriculture to shut down the slaughterhouse which was a major supplier of their National School Lunch Program and In-N-Out Burger.
The sad film produced by animal rights group Compassion Over Killing reveals how already sick cows are stunned when they are unable to walk to their deaths and shows how they are hoisted up by their legs onto conveyor-belts even if the bolt-gun has failed to kill the animal.

A cow starts vomiting after a pneumatic bolt gun fails to kill it as it is transported along a conveyor belt in a slaughterhouse
Most of the animals slaughtered by CVM are 'spent' dairy cows who are no longer economically viable as milk-producers to the dairy industry.
And now USDA regulators who shut down the slaughterhouse after viewing the animal welfare video are investigating whether beef from sick cows reached the human food supply.
The investigation will determine whether sick cows were slaughtered and whether meat products from the company should be recalled, said Justin DeJong, a spokesman for the USDA Food Safety Inspection Service.
There is no indication any of the cows slaughtered at the Central Valley Meat plant were diseased and the USDA did not order a recall of beef coming from the plant.
A spokesman for In-N-Out Burger said that CVM provided between 20 to 30 percent of the meat used by their restaurants and that it canceled its contract immediately.
The west cost burger chain has a loyal following and is regulalry patronised by Hollywood celebrities such as the soccer player David Beckham.
On the firm's website the chain claims to make its own hamburger patties 'using premium cattle selected especially for In-N-Out Burger', and says it pays 'a premium' for this.
In a statement to
ABC News, the company's chief operating officer, Mark Taylor said, 'In-N-Out Burger would never condone the inhumane treatment of animals, and, in fact, all of our suppliers must agree to abide by our strict standards for the humane treatment of cattle.'
The agency suspended operations Monday at Central Valley Meat Co. in Hanford after receiving the video Friday from the animal welfare group Compassion Over Killing (COK).
The footage shows animals bleeding and thrashing after being repeatedly shot in the head with a pneumatic gun in unsuccessful efforts to kill them for slaughter.
Federal regulations say that to avoid unnecessary suffering during slaughter, animals must be rendered unconscious by a single shot to the head from a pneumatic gun that fires a bolt through the skull to pierce the brain.
The USDA said investigators are trying to determine whether the cows in the video were just lame or sick, which would render them unfit for human consumption.
'That's the main issue right now,' said DeJong of the USDA's Food Safety Inspection Service.
Central Valley Meat Co., owned by Brian and Lawrence Coelho, declined to comment on the video, saying company officials had not seen it.
Comment: The British branch of the Ministry of Truth could hardly allow a monument to its greatest critic now, could it?