Slaughterhouse

A slaughterhouse, also called abattoir (/ˈæbətwɑːr/ (listen)), is a facility where animals are slaughtered, most often (though not always) to provide food for humans. Slaughterhouses supply meat, which then becomes the responsibility of a packaging facility.

"Abattoir" redirects here. For other uses, see Abattoir (disambiguation) and Slaughterhouse (disambiguation).

Workers and cattle in a slaughterhouse in 1942.

Slaughterhouses that produce meat that is not intended to be eaten by humans are sometimes referred to as knacker's yards or knackeries. This is where animals are slaughtered that are not fit for human consumption or that can no longer work on a farm, such as retired work horses.

Slaughtering animals on a large scale poses significant problems in terms of logistics, animal welfare, and the environment, and the process must meet public health requirements. Due to public aversion in many cultures, determining where to build slaughterhouses is also a matter of some consideration.

Frequently, animal rights groups raise concerns about the methods of transport to and from slaughterhouses, preparation prior to slaughter, animal herding, and the killing itself.[1]

History
In the slaughterhouse, Lovis Corinth, 1893.

Until modern times, the slaughter of animals generally took place in a haphazard and unregulated manner in diverse places. Early maps of London show numerous stockyards in the periphery of the city, where slaughter occurred in the open air or under cover such as wet markets. A term for such open-air slaughterhouses was shambles, and there are streets named "The Shambles" in some English and Irish towns (e.g., Worcester, York, Bandon) which got their name from having been the site on which butchers killed and prepared animals for consumption. Fishamble Street, Dublin was formerly a fish-shambles.

Reform movement

The slaughterhouse emerged as a coherent institution in the nineteenth century.[2] A combination of health and social concerns, exacerbated by the rapid urbanisation experienced during the Industrial Revolution, led social reformers to call for the isolation, sequester and regulation of animal slaughter. As well as the concerns raised regarding hygiene and disease, there were also criticisms of the practice on the grounds that the effect that killing had, both on the butchers and the observers, "educate[d] the men in the practice of violence and cruelty, so that they seem to have no restraint on the use of it." An additional motivation for eliminating private slaughter was to impose a careful system of regulation for the "morally dangerous" task of putting animals to death.

The Smithfield Market in 1855, before it was reconstructed.

As a result of this tension, meat markets within the city were closed and abattoirs built outside city limits. An early framework for the establishment of public slaughterhouses was put in place in Paris in 1810, under the reign of the Emperor Napoleon. Five areas were set aside on the outskirts of the city and the feudal privileges of the guilds were curtailed.[3]

As the meat requirements of the growing number of residents in London steadily expanded, the meat markets both within the city and beyond attracted increasing levels of public disapproval. Meat had been traded at Smithfield Market as early as the 10th century. By 1726, it was regarded as "without question, the greatest in the world", by Daniel Defoe.[4] By the middle of the 19th century, in the course of a single year 220,000 head of cattle and 1,500,000 sheep would be "violently forced into an area of five acres, in the very heart of London, through its narrowest and most crowded thoroughfares".[5]

Part of the original construction of the Smithfield Market in 1868.

By the early 19th century, pamphlets were being circulated arguing in favour of the removal of the livestock market and its relocation outside of the city due to the extremely poor hygienic conditions[6] as well as the brutal treatment of the cattle.[7] In 1843, the Farmer's Magazine published a petition signed by bankers, salesmen, aldermen, butchers and local residents against the expansion of the livestock market.[5]

An Act of Parliament was finally passed in 1852. Under its provisions, a new cattle-market was constructed in Copenhagen Fields, Islington. The new Metropolitan Cattle Market was also opened in 1855, and West Smithfield was left as waste ground for about a decade, until the construction of the new market began in the 1860s under the authority of the 1860 Metropolitan Meat and Poultry Market Act.[8] The market was designed by architect Sir Horace Jones and was completed in 1868.

A cut and cover railway tunnel was constructed beneath the market to create a triangular junction with the railway between Blackfriars and Kings Cross.[9] This allowed animals to be transported into the slaughterhouse by train and the subsequent transfer of animal carcasses to the Cold Store building, or direct to the meat market via lifts.

At the same time, the first large and centralized slaughterhouse in Paris was constructed in 1867 under the orders of Napoleon III at the Parc de la Villette and heavily influenced the subsequent development of the institution throughout Europe.

Regulation and expansion
Blueprint for a mechanized public abattoir, designed by slaughterhouse reformer Benjamin Ward Richardson.

These slaughterhouses were regulated by law to ensure good standards of hygiene, the prevention of the spread of disease and the minimization of needless animal cruelty. The slaughterhouse had to be equipped with a specialized water supply system to effectively clean the operating area of blood and offal. Veterinary scientists, notably George Fleming and John Gamgee, campaigned for stringent levels of inspection to ensure that epizootics such as rinderpest (a devastating outbreak of the disease covered all of Britain in 1865) would not be able to spread. By 1874, three meat inspectors were appointed for the London area, and the Public Health Act 1875 required local authorities to provide central slaughterhouses (they were only given powers to close unsanitary slaughterhouses in 1890).[10] Yet the appointment of slaughterhouse inspectors and the establishment of centralised abattoirs took place much earlier in the British colonies, such as the colonies of New South Wales and Victoria. In Victoria, for example, the Melbourne Abattoirs Act 1850 (NSW) "confined the slaughtering of animals to prescribed public abattoirs, while at the same time prohibiting the killing of sheep, lamb, pigs or goats at any other place within the city limits".[11]

Attempts were also made throughout the British Empire to reform the practice of slaughter itself, as the methods used came under increasing criticism for causing undue pain to the animals. The eminent physician, Benjamin Ward Richardson, spent many years in developing more humane methods of slaughter. He brought into use no less than fourteen possible anesthetics for use in the slaughterhouse and even experimented with the use of electric current at the Royal Polytechnic Institution.[12] As early as 1853, he designed a lethal chamber that would gas animals to death relatively painlessly, and he founded the Model Abattoir Society in 1882 to investigate and campaign for humane methods of slaughter.

The invention of refrigeration and the expansion of transportation networks by sea and rail allowed for the safe exportation of meat around the world. Additionally, meat-packing millionaire Philip Danforth Armour's invention of the 'disassembly line' greatly increased the productivity and profit margin of the meat packing industry: "according to some, animal slaughtering became the first mass-production industry in the United States." This expansion has been accompanied by increased concern about the physical and mental conditions of the workers along with controversy over the ethical and environmental implications of slaughtering animals for meat.[2]

Design

In the latter part of the 20th century, the layout and design of most U.S. slaughterhouses was influenced by the work of Temple Grandin.[13] She suggested that reducing the stress of animals being led to slaughter may help slaughterhouse operators improve efficiency and profit.[14] In particular she applied an understanding of animal psychology to design pens and corrals which funnel a herd of animals arriving at a slaughterhouse into a single file ready for slaughter. Her corrals employ long sweeping curves[15][16][17] so that each animal is prevented from seeing what lies ahead and just concentrates on the hind quarters of the animal in front of it. This design – along with the design elements of solid sides, solid crowd gate, and reduced noise at the end point – work together to encourage animals forward in the chute and to not reverse direction.[18]

As of 2011, Grandin claimed to have designed over 54% of the slaughterhouses in the United States as well as many others around the world.

Mobile design

Beginning in 2008 the Local Infrastructure for Local Agriculture, a non-profit committed to revitalizing opportunities for "small farmers and strengthening the connection between local supply and demand",[19] constructed a mobile slaughterhouse facility in efforts for small farmers to process meat quickly and cost effectively. Named the Modular Harvest System, or M.H.S., it received USDA approval in 2010. The M.H.S. consists of three separate trailers: One for slaughtering, one for consumable body parts, and one for other body parts. Preparation of individual cuts is done at a butchery or other meat preparation facility.[19]

International variations

The standards and regulations governing slaughterhouses vary considerably around the world. In many countries the slaughter of animals is regulated by custom and tradition rather than by law. In the non-Western world, including the Arab world, the Indian sub-continent, etc., both forms of meat are available: one which is produced in modern mechanized slaughterhouses, and the other from local butcher shops.

In some communities animal slaughter and permitted species may be controlled by religious laws, most notably halal for Muslims and kashrut for Jewish communities. This can cause conflicts with national regulations when a slaughterhouse adhering to the rules of religious preparation is located in some Western countries. In Jewish law, captive bolts and other methods of pre-slaughter paralysis are generally not permissible, due to it being forbidden for an animal to be stunned prior to slaughter. Various halal food authorities have more recently permitted the use of a recently developed fail-safe system of head-only stunning where the shock is non-fatal, and where it is possible to reverse the procedure and revive the animal after the shock. The use of electronarcosis[20] and other methods of dulling the sensing has been approved by the Egyptian Fatwa Committee. This allows these entities to continue their religious techniques while keeping accordance to the national regulations.[21]

In some societies, traditional cultural and religious aversion to slaughter led to prejudice against the people involved. In Japan, where the ban on slaughter of livestock for food was lifted in the late 19th century, the newly found slaughter industry drew workers primarily from villages of burakumin, who traditionally worked in occupations relating to death (such as executioners and undertakers). In some parts of western Japan, prejudice faced by current and former residents of such areas (burakumin "hamlet people") is still a sensitive issue. Because of this, even the Japanese word for "slaughter" (屠殺 tosatsu) is deemed politically incorrect by some pressure groups as its inclusion of the kanji for "kill" (殺) supposedly portrays those who practice it in a negative manner.

Some countries have laws that exclude specific animal species or grades of animal from being slaughtered for human consumption, especially those that are taboo food. The former Indian Prime Minister Atal Bihari Vajpayee suggested in 2004 introducing legislation banning the slaughter of cows throughout India, as Hinduism holds cows as sacred and considers their slaughter unthinkable and offensive. This was often opposed on grounds of religious freedom. The slaughter of cows and the importation of beef into the nation of Nepal are strictly forbidden.

Freezing works

Refrigeration technology allowed meat from the slaughterhouse to be preserved for longer periods. This led to the concept as the slaughterhouse as a freezing works. Prior to this, canning was an option.[22] Freezing works are common in New Zealand, Australia and South Africa. In countries where meat is exported for a substantial profit the freezing works were built near docks, or near transport infrastructure.[23]

Mobile poultry processing units (MPPUs) follow the same principles, but typically require only one trailer and, in much of the United States, may legally operate under USDA exemptions not available to red meat processors.[24] Several MPPUs have been in operation since before 2010, under various models of operation and ownership.[25]

Law
USDA inspection of pig

Most countries have laws in regard to the treatment of animals in slaughterhouses. In the United States, there is the Humane Slaughter Act of 1958, a law requiring that all swine, sheep, cattle, and horses be stunned unconscious with application of a stunning device by a trained person before being hoisted up on the line. There is some debate over the enforcement of this act. This act, like those in many countries, exempts slaughter in accordance to religious law, such as kosher shechita and dhabiha halal. Most strict interpretations of kashrut require that the animal be fully sensible when its carotid artery is cut.

The novel The Jungle detailed unsanitary conditions, fictionalized, in slaughterhouses and the meatpacking industry during the 1800s. This led directly to an investigation commissioned directly by President Theodore Roosevelt, and to the passage of the Meat Inspection Act and the Pure Food and Drug Act of 1906, which established the Food and Drug Administration. A much larger body of regulation deals with the public health and worker safety regulation and inspection.

Worker exploitation concerns

American slaughterhouse workers are three times more likely to suffer serious injury than the average American worker.[26] NPR reports that pig and cattle slaughterhouse workers are nearly seven times more likely to suffer repetitive strain injuries than average.[27] The Guardian reports that on average there are two amputations a week involving slaughterhouse workers in the United States.[28] On average, one employee of Tyson Foods, the largest meat producer in America, is injured and amputates a finger or limb per month.[29] The Bureau of Investigative Journalism reported that over a period of six years, in the UK 78 slaughter workers lost fingers, parts of fingers or limbs, more than 800 workers had serious injuries, and at least 4,500 had to take more than three days off after accidents.[30] In a 2018 study in the Italian Journal of Food Safety, slaughterhouse workers are instructed to wear ear protectors to protect their hearing from the constant screams of animals being killed.[31] A 2004 study in the Journal of Occupational and Environmental Medicine found that "excess risks were observed for mortality from all causes, all cancers, and lung cancer" in workers employed in the New Zealand meat processing industry.[32]

The worst thing, worse than the physical danger, is the emotional toll. If you work in the stick pit [where hogs are killed] for any period of time—that let's [sic] you kill things but doesn't let you care. You may look a hog in the eye that's walking around in the blood pit with you and think, 'God, that really isn't a bad looking animal.' You may want to pet it. Pigs down on the kill floor have come up to nuzzle me like a puppy. Two minutes later I had to kill them - beat them to death with a pipe. I can't care.

— Gail A. Eisnitz, [33]

Working at slaughterhouses often leads to a high amount of psychological trauma.[34][35] A 2016 study in Organization indicates, "Regression analyses of data from 10,605 Danish workers across 44 occupations suggest that slaughterhouse workers consistently experience lower physical and psychological well-being along with increased incidences of negative coping behavior."[36] In her thesis submitted to and approved by University of Colorado, Anna Dorovskikh states that slaughterhouse workers are "at risk of Perpetration-Inducted Traumatic Stress, which is a form of posttraumatic stress disorder and results from situations where the concerning subject suffering from PTSD was a causal participant in creating the traumatic situation."[37] A 2009 study by criminologist Amy Fitzgerald indicates, "slaughterhouse employment increases total arrest rates, arrests for violent crimes, arrests for rape, and arrests for other sex offenses in comparison with other industries."[38] As authors from the PTSD Journal explain, "These employees are hired to kill animals, such as pigs and cows that are largely gentle creatures. Carrying out this action requires workers to disconnect from what they are doing and from the creature standing before them. This emotional dissonance can lead to consequences such as domestic violence, social withdrawal, anxiety, drug and alcohol abuse, and PTSD."[39]

Slaughterhouses in the United States commonly illegally employ and exploit underage workers and illegal immigrants.[40][41] In 2010, Human Rights Watch described slaughterhouse line work in the United States as a human rights crime.[42] In a report by Oxfam America, slaughterhouse workers were observed not being allowed breaks, were often required to wear diapers, and were paid below minimum wage.[43]

Animal welfare concerns
Further information: Animal slaughter, Animal welfare, and Cruelty to animals


In 1997, Gail Eisnitz, chief investigator for the Humane Farming Association (HFA),[44] released a book Slaughterhouse. Within, she unveils the interviews of slaughterhouse workers in the U.S. who say that, because of the speed with which they are required to work, animals are routinely skinned while apparently alive and still blinking, kicking and shrieking. Eisnitz argues that this is not only cruel to the animals but also dangerous for the human workers, as cows weighing several thousands of pounds thrashing around in pain are likely to kick out and debilitate anyone working near them.[45]

This would imply that certain slaughterhouses throughout the country are not following the guidelines and regulations spelled out by the Humane Slaughter Act, requiring all animals to be put down and thus insusceptible to pain by some form, typically electronarcosis, before undergoing any form of violent action.

According to the HFA, Eiznitz interviewed slaughterhouse workers representing over two million hours of experience, who, without exception, told her that they have beaten, strangled, boiled and dismembered animals alive or have failed to report those who do. The workers described the effects the violence has had on their personal lives, with several admitting to being physically abusive or taking to alcohol and other drugs.[46]

The HFA alleges that workers are required to kill up to 1,100 hogs an hour and end up taking their frustration out on the animals.[46] Eisnitz interviewed one worker, who had worked in ten slaughterhouses, about pig production. He told her:

"Hogs get stressed out pretty easy. If you prod them too much, they have heart attacks. If you get a hog in the chute that's had the shit prodded out of him and has a heart attack or refuses to move, you take a meat hook and hook it into his bunghole. You try to do this by clipping the hipbone. Then you drag him backwards. You're dragging these hogs alive, and a lot of times the meat hook rips out of the bunghole. I've seen hams — thighs — completely ripped open. I've also seen intestines come out. If the hog collapses near the front of the chute, you shove the meat hook into his cheek and drag him forward."[47]

Animal rights activists, anti-speciesists, vegetarians and vegans are prominent critics of slaughterhouses and have created events such as the March to close all slaughterhouses to voice concerns about the conditions in slaughterhouses and ask for their abolition. Some have gone so far as to argue that humane animal slaughter is impossible.[48]

Fish
Further information: Fishing § Animal_welfare_concerns
gollark: IRC is basically as secure as Discord.
gollark: Sort of. Not really.
gollark: I run a homeserver.
gollark: Matrix, but it's not very popular.
gollark: There are though, and why would they care?

See also

References
  1. Terlouw, E., Arnould, C., Auperin, B., Berri, C., Le Bihan-Duval, E., Deiss, V., ... Mounier, L. (2008). "Pre-slaughter conditions, animal stress and welfare: Current status and possible future research". Animal 2 (10), p. 1501-1517. doi:10.1017/S1751731108002723
  2. "A Social History of the Slaughterhouse" (PDF). Human Ecology Review. Cite journal requires |journal= (help)
  3. Paula Young Lee (2008). Meat, Modernity, and the Rise of the Slaughterhouse. UPNE. p. 26. ISBN 9781584656982.
  4. Defoe, Daniel (1726). A Tour Through the Whole Island of Great Britain. p. 342. ISBN 978-0-300-04980-0.
  5. The Farmer's Magazine. London: Rogerson and Tuxford, 1849. 1849. p. 142.
  6. Dodd, George (1856). The Food of London: A Sketch of the Chief Varieties, Sources of Supply, Probable Quantities, Modes of Arrival, Processes of Manufacture, Suspected Adulteration, and Machinery of Distribution, of the Food for a Community of Two Millions and a Half. Longman, Brown, Green and Longmans. p. 228.
  7. Kean, Hilda (1998). "'Wild' domestic animals and the Smithfield Market". Animal rights: political and social change in Britain since 1800. Reaktion Books. p. 59. ISBN 978-1-86189-014-6.
  8. Thornbury, Walter (1878). "The Metropolitan Meat-Market". Old and New London: Volume 2. pp. 491–496. Retrieved 1 February 2008.
  9. Snowhill Archived 2013-06-05 at the Wayback Machine (London Railways) accessed 13 April 2009
  10. Chris Otter (2006). "The vital city: public analysis, dairies and slaughterhouses in nineteenth-century" (PDF). Cultural Geographies.
  11. Trabsky, Marc (2014). "Institutionalising the Public Abattoir in Nineteenth Century Colonial Society". Australian Feminist Law Journal. 40 (2): 180. doi:10.1080/13200968.2014.981357.
  12.  This article incorporates text from a publication now in the public domain: Power, D'Arcy (1901). "Richardson, Benjamin Ward". Dictionary of National Biography (1st supplement). London: Smith, Elder & Co.
  13. Grandin, T. "Best Practices for Animal Handling and Stunning", Meat & Poultry, April 2000, p. 76.
  14. Grandin, T. and Deesing, M. "Humane Livestock Handling" 2008. Storey Publishing, North Adams, MA, USA.
  15. Grandin, Temple (September 2011). "Directions for laying out curved cattle handling facilities for ranches, feedlots, and properties". Dr. Temple Grandin's Web Page. Dr. Temple Grandin. Retrieved 10 December 2012. Round crowd pens and curved single file chutes work better than straight ones, but they must be laid out correctly. A curved chute works more efficiently than a straight one because it prevents cattle from seeing people and other activities at the end of the chute." "A round crowd pen will work better than a straight crowd pen because, as cattle go around a 180° turn, they think they are going back to where they came from
  16. Grandin, Temple (July 2011). "Sample Designs of Cattle Races and Corrals". Dr. Temple Grandin's Web Page. Dr. Temple Grandin. Retrieved 10 December 2012. Why does a curved chute and round crowd pen work better than a straight one? As the animals go around the curve, they think they are going back to where they came from. The animals can not see people and other moving objects at the end of the chute. It takes advantage of the natural circling behaviour of cattle and sheep.
  17. Grandin, Temple (1993). "Teaching Principles of Behavior and Equipment Design for Handling Livestock". J. Anim. Sci. J. Anim. Sci. 71 (4): 1065–70. doi:10.2527/1993.7141065x. hdl:10217/4153. PMID 8478279. Retrieved 10 December 2012. Some of the design principles that are taught are the use of solid sides on chutes and crowd pens to prevent animals from seeing out with their wide-angle vision and layout of curved chutes and round crowd pens. Some people believe the animals can smell or hear death, however, and these may be area that need improvement, such as the use of scent masking agents or acoustical barriers. As well, some animals in some situations may grow to learn that after their fellows are corralled in that area, their fellows never return. An improvement could be made by detouring off some of the animals so that they return to the pack (after the odors and sounds are masked so they will return untraumatized). A circular crowd pen and a curved chute reduced the time spent moving cattle by up to 50% (Vowles and Hollier, 1982 [Vowles, W. J., and T. J. Hollier. 1982. The influence of yard design on the movement of animals. Proc. Aust. Soc. Anim. Prod. 14:597]).
  18. Grandin, Temple (July 2010). "Improving the Movement of Cattle, Pigs, and Sheep during handling on farms, ranches, and slaughter plants". Dr Temple Grandin. Retrieved 10 December 2012. Cattle will move more easily through a curved race. Solid sides which prevent the cattle from seeing people and other distractions outside the fence should be installed on the chutes (races) and the crowd pen which leads up to the single file chute. The use of solid sides is especially important in slaughter plants, truck loading ramps, and other places where there is much activity outside the fence. Solid sides are essential in slaughter plants to block the animal's view of people and equipment. A curved chute (race) with solid sides at a ranch facility. It works better than a straight chute because cattle think they are going back to where they came from. The outer fence is solid to prevent the cattle from seeing distractions outside the fence... The facility must be located in a pasture that has no nearby equipment, moving vehicles or extra people, or put inside a building that has solid side walls. In many facilities, adding solid fences will improve animal movement... Solid sides in these areas help prevent cattle from becoming agitated when they see activity outside the fence -- such as people. Cattle tend to be calmer in a chute with solid sides. Cattle move more easily through the curved race system because they can not see people and other distractions ahead.
  19. Muhlke, Christine (20 May 2010). "A Movable Beast". Retrieved 8 January 2019 – via NYTimes.com.
  20. "electronarcosis - Wiktionary". en.wiktionary.org. Retrieved 27 March 2017.
  21. "The Opinions of the Ulema on the Permissibility of Stunning Animals". Egyptian Fatwaa Committee. 18 December 1978. Archived from the original on 2 December 2012.
  22. "The 19th Century Heritage: the meat industry". www.techhistory.co.nz. Retrieved 8 January 2019.
  23. Taonga, New Zealand Ministry for Culture and Heritage Te Manatu. "7. – Agricultural processing industries – Te Ara Encyclopedia of New Zealand". teara.govt.nz. Retrieved 8 January 2019.
  24. "Building an On-Farm Poultry Processing Facility". www.sare.org. Retrieved 6 June 2020.
  25. "Mobile Poultry Processing Units: Reports From the Field". www.www.nichemeatprocessing.org. Retrieved 6 June 2020.
  26. "Meatpacking". Occupational Safety and Health Administration. Retrieved 23 May 2019.
  27. Lowe, Peggy (11 August 2016). "Working 'The Chain,' Slaughterhouse Workers Face Lifelong Injuries". National Public Radio. Retrieved 23 May 2019.
  28. "Two amputations a week: the cost of working in a US meat plant". The Guardian. 5 July 2018. Retrieved 23 May 2019.
  29. Lewis, Cora (18 February 2018). "America's Largest Meat Producer Averages One Amputation Per Month". Buzzfeed News. Retrieved 23 May 2019.
  30. "Revealed: Shocking safety record of UK meat plants". The Bureau of Investigative Journalism. 29 July 2018. Retrieved 23 May 2019.
  31. Francesca Iulietto, Maria; Sechi, Paola (3 July 2018). "Noise assessment in slaughterhouses by means of a smartphone app". Italian Journal of Food Safety. 7 (2): 7053. doi:10.4081/ijfs.2018.7053. PMC 6036995. PMID 30046554.
  32. McLean, D; Cheng, S (June 2004). "Mortality and cancer incidence in New Zealand meat workers". Journal of Occupational and Environmental Medicine. 61 (6): 541–547. doi:10.1136/oem.2003.010587. PMC 1763658. PMID 15150395.
  33. Eisnitz, Gail A. (1997). Slaughterhouse: : The Shocking Story of Greed, Neglect, And Inhumane Treatment Inside the U.S. Meat Industry. Prometheus Books.
  34. Lebwohl, Michael (25 January 2016). "A Call to Action: Psychological Harm in Slaughterhouse Workers". The Yale Global Health Review. Retrieved 23 May 2019.
  35. Nagesh, Ashitha (31 December 2017). "The harrowing psychological toll of slaughterhouse work". Metro. Retrieved 23 May 2019.
  36. Baran, B. E.; Rogelberg, S. G.; Clausen, T (2016). "Routinized killing of animals: Going beyond dirty work and prestige to understand the well-being of slaughterhouse workers". Organization. 23 (3): 351–369. doi:10.1177/1350508416629456.
  37. Dorovskikh, Anna (2015). Killing for a Living: Psychological and Physiological Effects of Alienation of Food Production on Slaughterhouse Workers (BSc). University of Colorado, Boulder.
  38. Fitzgerald, A. J.; Kalof, L. (2009). "Slaughterhouses and Increased Crime Rates: An Empirical Analysis of the Spillover From "The Jungle" Into the Surrounding Community". Organization & Environment. 22 (2): 158–184. doi:10.1177/1350508416629456.
  39. "The Psychological Damage of Slaughterhouse Work". PTSDJournal. Retrieved 23 May 2019.
  40. Waldman, Peter (29 December 2017). "America's Worst Graveyard Shift Is Grinding Up Workers". Bloomberg Businessweek. Retrieved 23 May 2019.
  41. Grabell, Michael (1 May 2017). "Exploitation and Abuse at the Chicken Plant". The New Yorker. Retrieved 23 May 2019.
  42. "Rights on the Line". 11 December 2010. Retrieved 23 May 2019.
  43. Grabell, Michael. "Live on the Live". Oxfam America. Retrieved 23 May 2019.
  44. "HFA - The Humane Farming Association". www.hfa.org. Retrieved 8 January 2019.
  45. Eisnitz, Gail A. Slaughterhouse. Prometheus Books, 1997, cited in Torres, Bob. Making a Killing. AK Press, 2007, p. 46.
  46. "HFA Exposé Uncovers Federal Crimes" Archived 2009-05-19 at the Wayback Machine, Humane Farming Association. Retrieved March 8, 2008.
  47. Eisnitz, p. 82, cites in Torres, Bob. Making a Killing. AK Press, 2007, p. 47.
  48. Browning, H.; Veit, W. Is Humane Slaughter Possible? Animals 2020, 10, 799. https://doi.org/10.3390/ani10050799
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