
A slaughterhouse, also called abattoir (), is a facility where animals are
slaughtered
''Slaughtered'' (working title ''Schooner of Blood'') is an Australian slasher film directed by Kate Glover, and produced by Sue Brown. The film stars Steven O’Donnell and James Kerley
James (Kash Kab) Kerley is an Australian TV presenter ...
to provide food. Slaughterhouses supply meat, which then becomes the responsibility of a
packaging facility.
Slaughterhouses that produce meat that is not intended for human consumption 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 issues in terms of logistics,
animal welfare
Animal welfare is the well-being of non-human animals. Formal standards of animal welfare vary between contexts, but are debated mostly by animal welfare groups, legislators, and academics. Animal welfare science uses measures such as longevity ...
, and the environment, and the process must meet
public health requirements. Due to public aversion in different 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.
History
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
Fishamble Street (; ) is a street in Dublin, Ireland within the old city walls.
Location
The street joins Wood Quay at the Fish Slip near Fyan's Castle. It originally ran from Castle Street to Essex Quay until the creation of Lord Edward Stre ...
, Dublin was formerly a ''fish-shambles''. Sheffield had 183 slaughterhouses in 1910, and it was estimated that there were 20,000 in England and Wales.
Reform movement
The slaughterhouse emerged as a coherent institution in the 19th century.
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
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.
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
Napoleon Bonaparte ; it, Napoleone Bonaparte, ; co, Napulione Buonaparte. (born Napoleone Buonaparte; 15 August 1769 – 5 May 1821), later known by his regnal name Napoleon I, was a French military commander and political leader who ...
. Five areas were set aside on the outskirts of the city and the feudal privileges of the
guilds were curtailed.
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
Smithfield, properly known as West Smithfield, is a district located in Central London, part of Farringdon Without, the most westerly ward of the City of London, England.
Smithfield is home to a number of City institutions, such as St Bartho ...
as early as the 10th century. By 1726, it was regarded as "without question, the greatest in the world", by
Daniel Defoe
Daniel Defoe (; born Daniel Foe; – 24 April 1731) was an English writer, trader, journalist, pamphleteer and spy. He is most famous for his novel ''Robinson Crusoe'', published in 1719, which is claimed to be second only to the Bible in its ...
. 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".
By the early 19th century, pamphlets were being circulated arguing in favor of the removal of the livestock market and its relocation outside of the city due to the extremely low hygienic conditions
as well as the brutal treatment of the cattle. 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.
The
Town Police Clauses Act 1847 created a licensing and registration system, though few slaughter houses were closed.
An
Act of Parliament was eventually passed in 1852. Under its provisions, a new cattle-market was constructed in Copenhagen Fields,
Islington
Islington () is a district in the north of Greater London, England, and part of the London Borough of Islington. It is a mainly residential district of Inner London, extending from Islington's High Street to Highbury Fields, encompassing the ar ...
. 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. 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
King's Cross. 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
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
In epizoology, an epizootic (from Greek: ''epi-'' upon + ''zoon'' animal) is a disease event in a nonhuman animal population analogous to an epidemic in humans. An epizootic may be restricted to a specific locale (an "outbreak"), general (an "epi ...
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
The Public Health Act 1875c 55 is an Act of the Parliament of the United Kingdom, one of the Public Health Acts, and a significant step in the advancement of public health in England.
Its purpose was to codify previous measures aimed at combatin ...
required local authorities to provide central slaughterhouses (they were only given powers to close unsanitary slaughterhouses in 1890). 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, and in Scotland where 80% of cattle were slaughtered in public abattoirs by 1930. In Victoria th
''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". Animals were shipped alive to British ports from Ireland, from Europe and from the colonies and slaughtered in large abattoirs at the ports. Conditions were often very poor.
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
Sir Benjamin Ward Richardson (31 October 1828 – 21 November 1896) was a British physician, anaesthetist, physiologist, sanitarian, and a prolific writer on medical history. He was the recipient of the Fothergill gold medal, awarded by the M ...
, spent many years in developing more humane methods of slaughter. He brought into use no fewer than fourteen possible anesthetics for use in the slaughterhouse and even experimented with the use of electric current at the
Royal Polytechnic Institution. 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.
The Edinburgh abattoir, which was built in 1910, had well lit laboratories, hot and cold water, gas, microscopes and equipment for cultivating organisms. The English 1924 Public Health (Meat) Regulations required notification of slaughter to enable inspection of carcasses and enabled inspected carcasses to be marked.
The development of slaughterhouses was linked with industrial expansion of by-products. By 1932 the British by-product industry was worth about £97 million a year, employing 310,000 people. The Aberdeen slaughterhouse sent hooves to Lancashire to make glue, intestines to Glasgow for sausages and hides to the Midland tanneries.
In January 1940 the British government took over the 16,000 slaughterhouses and by 1942 there were only 779.
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. She suggested that reducing the stress of animals being led to slaughter may help slaughterhouse operators improve efficiency and profit. 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
[ 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.][ 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 owles, W. J., and T. J. Hollier. 1982. The influence of yard design on the movement of animals. Proc. Aust. Soc. Anim. Prod. 14:597.] 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.
[ 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.]
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",
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.
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
The Indian subcontinent is a physiographical region in Southern Asia. It is situated on the Indian Plate, projecting southwards into the Indian Ocean from the Himalayas. Geopolitically, it includes the countries of Bangladesh, Bhutan, India ...
, 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
Muslim
Muslims ( ar, المسلمون, , ) are people who adhere to Islam, a monotheistic religion belonging to the Abrahamic tradition. They consider the Quran, the foundational religious text of Islam, to be the verbatim word of the God of Abrah ...
s 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
Stunning is the process of rendering animals immobile or unconscious, with or without killing the animal, when or immediately prior to slaughtering them for food.
Rationale
Within the European Union, most animals slaughtered for human consumpt ...
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 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.
In some societies, traditional cultural and religious aversion to slaughter led to prejudice against the people involved. In
Japan
Japan ( ja, 日本, or , and formally , ''Nihonkoku'') is an island country in East Asia. It is situated in the northwest Pacific Ocean, and is bordered on the west by the Sea of Japan, while extending from the Sea of Okhotsk in the north ...
, 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
Western may refer to:
Places
*Western, Nebraska, a village in the US
*Western, New York, a town in the US
*Western Creek, Tasmania, a locality in Australia
*Western Junction, Tasmania, a locality in Australia
*Western world, countries that id ...
, 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 group
Advocacy groups, also known as interest groups, special interest groups, lobbying groups or pressure groups use various forms of advocacy in order to influence public opinion and ultimately policy. They play an important role in the develop ...
s 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
Atal Bihari Vajpayee (; 25 December 1924 – 16 August 2018) was an Indian politician who served three terms as the 10th prime minister of India, first for a term of 13 days in 1996, then for a period of 13 months fr ...
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. 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.
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. Several MPPUs have been in operation since before 2010, under various models of operation and ownership.
Law
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
(also or , ) is a set of dietary laws dealing with the foods that Jewish people are permitted to eat and how those foods must be prepared according to Jewish law. Food that may be consumed is deemed kosher ( in English, yi, כּשר), fro ...
shechita and
dhabiha halal. Most strict interpretations of kashrut require that the animal be fully sensible when its
carotid artery Carotid artery may refer to:
* Common carotid artery, often "carotids" or "carotid", an artery on each side of the neck which divides into the external carotid artery and internal carotid artery
* External carotid artery, an artery on each side of t ...
is cut.
The novel ''
The Jungle'' presented a fictionalized account of unsanitary conditions 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.
Animal welfare concerns
In 1997, Gail Eisnitz, chief investigator for the Humane Farming Association (HFA), released the 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.
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.
["HFA Exposé Uncovers Federal Crimes"](_blank)
, Humane Farming Association. Retrieved March 8, 2008.
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.
Eisnitz interviewed one worker, who had worked in ten slaughterhouses, about pig production. He told her:
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
The march to close all slaughterhouses is an international event in the form of annual demonstrations in support of the abolition of the meat, dairy, egg, and fish industries and their practices, including the breeding, fishing, and killing of ani ...
to voice concerns about the conditions in slaughterhouses and ask for their abolition. Some have argued that humane animal slaughter is impossible.
Worker exploitation concerns
American slaughterhouse workers are three times more likely to suffer serious injury than the average American worker.
NPR reports that pig and cattle slaughterhouse workers are nearly seven times more likely to suffer repetitive strain injuries than average. ''
The Guardian'' reports that on average there are two amputations a week involving slaughterhouse workers in the United States. On average, one employee of
Tyson Foods, the largest meat producer in America, is injured and amputates a finger or limb per month. 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. 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 loud noises in the facility. 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.
Working at slaughterhouses often leads to a high amount of psychological trauma. 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." 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." 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." 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."
Starting in the 1980s,
Cargill
Cargill, Incorporated, is a privately held American global food corporation based in Minnetonka, Minnesota, and incorporated in Wilmington, Delaware. Founded in 1865, it is the largest privately held corporation in the United States in ter ...
,
Conagra Brands, Tyson Foods and other large food companies moved most slaughterhouse operations to rural areas of the
Southern United States which were more hostile to unionization efforts. Slaughterhouses in the United States commonly illegally employ and exploit underage workers and illegal immigrants. In 2010,
Human Rights Watch described slaughterhouse line work in the United States as a human rights crime. 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.
See also
*
Animal–industrial complex
The term animal–industrial complex (AIC) refers to the systematic and institutionalized exploitation of animals. It includes every economic activity involving animals, such as the food industry (e.g., meat, dairy, poultry, apiculture), anima ...
*
Continuous inspection
*
Controlled-atmosphere killing
Inert gas asphyxiation is a form of asphyxiation which results from breathing a physiologically inert gas in the absence of oxygen, or a hypoxia (medical), low amount of oxygen, rather than atmospheric air (which is composed largely of nitrogen and ...
(CAK)
*
Cultured meat
*
Dog meat
Dog meat is the flesh and other edible parts derived from dogs. Historically, human consumption of dog meat has been recorded in many parts of the world. During the 19th century westward movement in the United States, ''mountainmen'', native A ...
*
Meat cutter
*
Meat processing
*
Pig slaughter
*
Pig scalder
*
Weasand clip A weasand clip is a device used in slaughtering animals in an abattoir. The clip is used to seal the weasand (the usual term for the animal's esophagus in slaughtering) so that the stomach contents do not leak out.
References
* "Safe Handling of F ...
References
External links
*
Slaughterhouse designer Temple Grandin's official sitedetailing her design principles, as well as many of the regulations affecting slaughter in the United States.
Grandin's listing of various surveys, 1996–2011, US, Canada and Australia
{{Authority control
Livestock
Animal rights
Agricultural buildings
Meat industry
Slaughter methods