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Animal Outlook recently obtained public records—including research protocols, photographs and approximately 10 hours of video footage—from experiments conducted by North Carolina State University (NCSU) researchers in 2016. The researchers sought and received funding from the U.S. Poultry and Egg Association, an industry trade group, to study the effects of ventilation shutdown (VSD) on chickens.
Animal Outlook is making the full set of records we received from NCSU
available for download here.
VSD is a controversial method of mass-killing farmed animals. In this barbaric practice, barns are sealed, airflow is cut off and the hundreds or even tens of thousands of animals inside slowly suffocate and die of heat stress or suffocation over extended periods of time. VSD is performed either on its own, or as what is referred to as VSD+ which adds heat or carbon dioxide to aid in killing the animals.
In the NCSU study, researchers subjected chickens for each phase of the experiment—plus additional birds for pilot phases—to VSD in various forms. The birds’ suffering was documented and, in some instances, recorded on video, in graphic detail. Each video depicts a single hen enclosed in a small box with a glass/plastic front panel for observation.
As the boxes get hotter and the air inside more stagnant, and as carbon dioxide is sometimes added, the chickens writhe, gasp, pant, stagger and even throw themselves against the walls of their confinement in a desperate attempt to escape. Eventually the birds collapse and, finally, die from heat and suffocation.
In the footage, researchers are seen observing the suffering hens, taking notes and manipulating equipment as they sipped bottled water with oscillating fans cooling them.
The agriculture industry is using VSD today. Millions of animals are being killed across the country due to the most recent massive avian flu outbreak, with untold numbers being suffocated and overheated by the cruel method depicted in these videos. According to the USDA and state agriculture departments, VSD has been used in several of the recent avian flu “depopulations,” including one at a Tyson facility in Stoddard, Missouri where this cruel method was used to kill more than 300,000 chickens being raised for meat.
VSD came into the public consciousness at the height of the coronavirus pandemic after COVID-19 outbreaks at slaughterhouses and resulting meat supply chain back-ups caused producers, who could not send their animals to slaughter, to mass-kill them on the farm instead.
Animal Outlook, together with other animal protection groups, filed an emergency petition asking the USDA to prevent any COVID relief funds from being used to facilitate or compensate farms for using VSD. Nearly two years later, the USDA has yet to respond, but has all but denied the petition by disbursing relief funds indiscriminately.
The American Veterinary Medical Association’s (AVMA) “depopulation” guidelines later cited NCSU experiments and approved the use of VSD+ for chickens in “constrained circumstances.” In light of these videos, Animal Outlook wrote to the AVMA Panel on Depopulation urging them to list all methods of VSD as "Not Recommended."
It doesn’t take experiments to realize that slowly cooking to death and suffocating birds is cruel, yet the poultry industry funded university researchers to optimize this mass-killing method so large facilities could cheaply kill entire flocks on a routine basis. The research helped pave the way for the approval of VSD+ by the AVMA. We can now see this widespread inherent cruelty for what it really is, demand accountability under the law, and remove our support from this industry by refusing to buy animal products.
- Jan 4, 2023 - Vox: The bitter civil war dividing American veterinarians
- April 14, 2022 - The Intercept: Amid Bird Flu Outbreak, Meat Producers Seek “VENTILATION SHUTDOWN” For Mass Chicken Killing
- April 18, 2022 - NowThis: In an effort to curb the worst U.S. bird flu outbreak yet, farms have reportedly resorted to inhumane methods of terminating infected birds
- April 24, 2022 - One Green Planet: North Carolina State University Exposed For Cruel ‘Ventilation Shutdown’ Method Used For Mass Animal Killing
- April 25, 2022 - KGO Radio: Will Lowrey: Exposing truth and inspiring change
- April 26, 2022 - VegNews: Nearly 23 Million Birds Dead As Avian Flu Wipes Out Farms in 29 States
- April 28, 2022 - The Guardian: US egg factory roasts alive 5.3m chickens in avian flu cull – then fires almost every worker
- April 28, 2022 - CBS News: Egg-laying facility in Iowa kills 5.3 million chickens, fires 200-plus workers
- April 29, 2022 - Business Insider: A prison inmate in a pre-release work program was the first recorded human case of the bird flu in the US
- April 28, 2022 - MSN/Yahoo: US egg factory roasts alive 5.3 million chickens in avian flu cull – then fires almost every worker
- April 28, 2022 - Food and Beverage Reporter: US egg factory roasts alive 5.3m chickens in avian flu cull – then fires almost every worker | Iowa
- April 29, 2022 - MSN: A prison inmate in a pre-release work program was the first recorded human case of the bird flu in the US
- April 29, 2022 - Specialty Food Magazine: Rembrandt Enterprises Culls 5.3 Million Chickens to Contain Flu
May 2, 2022 – PoultryProducer.com: Infected With Avian Flu, Northwest Iowa Farm Destroys Five Million Chickens, Lays Off 200 Workers
May 4, 2022 – NaturalNews.com: Iowa factory culls over 5 million chickens after ONE bird flu case, lays off 250 workers after burying dead birds
May 4, 2022 – NaturalNews.com: US egg factory roasts alive 5.3m chickens in avian flu cull before firing almost every worker
May 5, 2022 – Vox: The horrific bird flu that’s wiped out 36 million chickens and turkeys, explained
June 24, 2022 – Exposing the Big Game: The AMVA MUST Stop Condoning Ventilation Shutdown to Mass Murder Farmed Animals
July 2, 2022 – OpEdNews.com: Condemn Killing Birds Like This Veterinarians Say to the AMVA—Now!
July 8, 2022 – CounterPunch: The bitter civil war dividing American veterinarians
July 25, 2022 – AlterNet.org: How to reduce the suffering of factory farm animals
July 28, 2022 – LA Progressive: Animals Raised for Food and Treating Them with Respect
July 18, 2022 – Counterpunch: One Major Way We Can Reduce the Suffering of Animals Raised for Food