Sheep farming or sheep husbandry is the raising and breeding of domestic sheep. It is a branch of animal husbandry. Sheep are raised principally for their meat (lamb and mutton), milk (sheep's milk), and fiber (wool). They also yield sheepskin and parchment.
Sheep can be raised in a range of temperate climates, including arid zones near the equator and other torrid zones. Farmers build fences, housing, shearing sheds, and other facilities on their property, such as for water, feed, transport, and pest control. Most farms are managed so sheep can graze pastures, sometimes under the control of a shepherd or sheep dog.
Farmers can select from various breeds suitable for their region and market conditions. When the farmer sees that a ewe (female adult) is showing signs of heat or estrus, they can organise for mating with males. Newborn lambs are typically subjected to lamb marking, which involves tail docking, mulesing, earmarking, and males may be castrated. [1]
According to the FAOSTAT database of the United Nations Food and Agriculture Organization, the top five countries by number of head of sheep (average from 1993 to 2013) were: mainland China (146.5 million head), Australia (101.1 million), India (62.1 million), Iran (51.7 million), and the former Sudan (46.2 million). [2] Approximately 540 million sheep are slaughtered each year for meat worldwide. [3]
In 2013, the five countries with the largest number of head of sheep were mainland China (175 million), Australia (75.5 million), India (53.8 million), the former Sudan (52.5 million), and Iran (50.2 million). In 2018, Mongolia had 30.2 million sheep. In 2013, the number of head of sheep were distributed as follows: 44% in Asia, 28.2% in Africa; 11.2% in Europe, 9.1% in Oceania, 7.4% in the Americas.
The top producers of sheep meat (average from 1993 to 2013) were as follows: mainland China (1.6 million); Australia (618,000), New Zealand (519,000), the United Kingdom (335,000), and Turkey (288,857). [2] The top five producers of sheep meat in 2013 were mainland China (2 million), Australia (660,000), New Zealand (450,000), the former Sudan (325,000), and Turkey (295,000). [2]
In the United States, inventory data on sheep began in 1867, when 45 million head of sheep were counted in the United States. [4] The numbers of sheep peaked in 1884 at 51 million head, and then declined over time to almost 6 million head. [4]
Between the 1960s and 2012, per capita per year consumption of lamb and mutton has declined from nearly five pounds (about 2 kg) to just about one pound (450g), because of competition from poultry, pork, beef, and other meats. [4] Between the 1990s and 2012, U.S. sheep operations declined from around 105,000 to around 80,000 because of shrinking revenues and low rates of return. [4] According to the Economic Research Service of the United States Department of Agriculture, the sheep industry accounts for less than one percent of U.S. livestock industry receipts. [4]
Most lambs are born outdoors. Ewes can be made to give birth in fall, winter, or spring months, either by artificial insemination or by facilitating natural mating. [5] Fall lambing is generally not done as the lamb crop percentage is likely to be low; ewes often need hormone therapy to induce estrus and ovulation, and farm labor is often busy elsewhere during fall lambing. Furthermore, fall-born lambs can be weak and small because of heat stress during the summer gestation period. Spring lambing has the advantage of coinciding with the natural breeding and lambing seasons, but supplemental feed is often needed. The advantage of winter lambing is that the lambs are weaned in spring when pastures are most fertile. This allows the lambs to grow more quickly, and to be sold for slaughter during the summer (when prices are generally high), but it results in roughly one in every four newborn lambs dying within a few days of birth of malnutrition, disease, or exposure to the harsh cold. In the UK, it results in around 4 million newborn lamb deaths. [6] "Accelerated lambing" is the practice of lambing more than once a year, typically every 6 to 8 months. The advantages of accelerated lambing include increased lamb production, having lambs available for slaughter at different seasons, year-round use of labor and facilities, and increased income per ewe. It requires intensive management, early weaning, exogenous hormones, and artificial impregnation. It is often used to make old or soon-to-be infertile ewes give birth one more time before they are slaughtered. [5]
After lambs are several weeks old, lamb marking is carried out. [7] This involves ear tagging, docking, mulesing, and castrating.
Ear tags with numbers are attached, or ear marks are applied, for ease of later identification of sheep.
Tail docking is commonly done for welfare, having been shown to reduce risk of flystrike when compared to the alternative of letting sheep collect waste around their buttocks. [8]
The Merino breed, accounting for around 80% of the wool produced in Australia, have been selectively bred to have wrinkled skin resulting in excessive amounts of wool while making them much more prone to flystrike. [9] [10] [11] To reduce the risk of flystrike caused by soiling for the lambs who make it to summer, Merino lambs are often mulesed at the same time, which involves cutting off the skin around their buttocks and the base of their tail with metal shears. If the lambs are younger than 6 months, it is legal to do this in Australia without any pain relief. [12]
Male lambs are typically castrated. Castration is performed on ram lambs not intended for breeding, although some shepherds choose to omit this for ethical, economic or practical reasons. [7] A common castration technique is "elastration", which involves a thick rubber band being placed around the base of the infant's scrotum, obstructing the blood supply and causing atrophy. This method causes severe pain to the lambs who are provided no pain relief during the process. [13] Elastration is also commonly used for docking.
Based on the preference of the shepherd, docking and castration are commonly done after 24 hours (to avoid interference with maternal bonding and consumption of colostrum) and are often done not later than one week after birth to minimize pain, stress, recovery time, and complications. [14] [15] Ram lambs that will either be slaughtered or separated from ewes before sexual maturity are not usually castrated. [16] Objections to all these procedures have been raised by animal rights groups, but farmers defend them by saying they reduce costs, and inflict only temporary pain. [17] [7]
Although sheep primarily consume pasture roughage, they are sometimes given supplemental feed, such as corn and hay provided by the shepherds from their own fields.
Sheep not meant to be eaten are typically shorn annually in a shearing shed. Ewes tend to be shorn immediately prior to lambing. [18] Shearing can be done with either manual blades or machine shears. In Australia, sheep shearers are paid by the number of sheep shorn, not by the hour, and there are no requirements for formal training or accreditation. [19] Because of this, it is alleged that speed is prioritised over precision and care of the animal. [20]
Crutching is the practice of removing wool for hygiene reasons, typically from around the face and buttocks.
Sheep sold for slaughter often pass through saleyards, also known as auctions.
When sheep can no longer produce enough wool to be considered profitable, they are sent to slaughter and sold as mutton, and lambs raised for meat are killed between 4 and 12 months of age. [21] Sheep have a natural lifespan of 12–14 years.
George Monbiot's 2013 book Feral [22] attacks sheep farming in the United Kingdom as "a slow-burning ecological disaster, which has done more damage to the living systems of this country than either climate change or industrial pollution. Yet scarcely anyone seems to have noticed." [23] He particularly looks at sheep farming in Wales.
Lamb and mutton, collectively sheep meat is one of the most common meats around the world, taken from the domestic sheep, Ovis aries, and generally divided into lamb, from sheep in their first year, hogget, from sheep in their second, and mutton, from older sheep. Generally, "hogget" and "sheep meat" are not used by consumers outside Norway, New Zealand, South Africa, Scotland, and Australia. Hogget has become more common in England, particularly in the North often in association with rare breed and organic farming.
The Merino is a breed or group of breeds of domestic sheep, characterised by very fine soft wool. It was established in Spain near the end of the Middle Ages, and was for several centuries kept as a strict Spanish monopoly; exports of the breed were not allowed, and those who tried risked capital punishment. During the eighteenth century, flocks were sent to the courts of a number of European countries, including France, Hungary, the Netherlands, Prussia, Saxony and Sweden.
The Herdwick is a breed of domestic sheep native to the Lake District in North West England. The name "Herdwick" is derived from the Old Norse herdvyck, meaning sheep pasture. Though low in lambing capacity and perceived wool quality when compared to more common commercial breeds, Herdwicks are prized for their robust health, their ability to live solely on forage, and their tendency to be territorial and not to stray over the difficult upland terrain of the Lake District. It is considered that up to 99% of all Herdwick sheep are commercially farmed in the central and western Lake District.
Mulesing is the removal of strips of wool-bearing skin from around the breech (buttocks) of a sheep to prevent the parasitic infection flystrike (myiasis). The wool around the buttocks can retain feces and urine, which attracts flies. The scar tissue that grows over the wound does not grow wool, so is less likely to attract the flies that cause flystrike. Mulesing is a common practice in Australia for this purpose, particularly on highly wrinkled Merino sheep. Mulesing is considered by some to be a skilled surgical task. Mulesing can only affect flystrike on the area cut out and has no effect on flystrike on any other part of the animal's body.
Sheep shearing is the process by which the woollen fleece of a sheep is cut off. The person who removes the sheep's wool is called a shearer. Typically each adult sheep is shorn once each year. The annual shearing most often occurs in a shearing shed, a facility especially designed to process often hundreds and sometimes more than 3,000 sheep per day. A working group of shearers and accompanying wool workers is known as a shearing gang.
Crutching refers to the removal of wool from around the tail and between the rear legs of a sheep for hygiene purposes. It can also refer to removing wool from the heads of sheep. It does not refer to the process of mulesing—a controversial procedure that involves removing of strips of wool-bearing skin from around the breech (buttocks) of a sheep.
A sheep station is a large property in Australia or New Zealand, whose main activity is the raising of sheep for their wool and/or meat. In Australia, sheep stations are usually in the south-east or south-west of the country. In New Zealand the Merinos are usually in the high country of the South Island. These properties may be thousands of square kilometres in size and run low stocking rates to be able to sustainably provide enough feed and water for the stock.
The Border Leicester is a British breed of sheep. It is a polled, long-wool sheep and is considered a dual-purpose breed as it is reared both for meat and for wool. It is known for its distinctive upright ears. The sheep are large but docile. They have been exported to other sheep-producing regions, including Australia and the United States.
Lamb marking is the term applied to the procedure of earmarking, castration and tail-docking of the lambs of domestic sheep. Vaccination is usually carried out then, too. Sheep are usually ear marked at approximately 3 months of age after lambing (birth). Lambs are castrated to prevent full development of reproductive organs and hormones. Ear marking is used to identify each lamb in the flock and tail-docking is usually carried out to prevent blowfly strike. At some stage, blow-flies lay their eggs within moist and warm areas of the sheep. Then, the maggots grow and eat away the live flesh of the sheep. This causes great distress and pain for the lamb. Sometimes lambs are also mulesed. This is also carried out for the same reason.
The Romney, formerly called the Romney Marsh sheep but generally referred to by the local farmers as the Kent, is a breed of sheep originating in England. The Romney is a "long-wool" breed recognized in England by 1800. Exported to other continents, the Romney is an economically important sheep breed, especially to the sheep-meat and wool export trades of New Zealand.
The Finnish Landrace, Finn or Finnsheep is a breed of domestic sheep native to Finland. It is one of several Northern European short-tailed sheep breeds, but is notable for its high incidence of multiple births – it is common for a ewe to have three, four, or even five lambs at once.
The raising of domestic sheep has occurred in nearly every inhabited part of the earth, and the variations in cultures and languages which have kept sheep has produced a vast lexicon of unique terminology used to describe sheep husbandry.
Domesticated sheep are herd animals that are bred for agricultural trade. A flock of sheep is mated by a single ram, which has either been chosen by a farmer or, in feral populations, has established dominance through physical contests with other rams. Sheep have a breeding season (tupping) in the autumn, though some can breed year-round.
Sheep or domestic sheep are a domesticated, ruminant mammal typically kept as livestock. Although the term sheep can apply to other species in the genus Ovis, in everyday usage it almost always refers to domesticated sheep. Like all ruminants, sheep are members of the order Artiodactyla, the even-toed ungulates. Numbering a little over one billion, domestic sheep are also the most numerous species of sheep. An adult female is referred to as a ewe, an intact male as a ram, occasionally a tup, a castrated male as a wether, and a young sheep as a lamb.
Lucilia cuprina, formerly named Phaenicia cuprina, the Australian sheep blowfly is a blow fly in the family Calliphoridae. It causes the condition known as "sheep strike"'. The female fly locates a sheep with ideal conditions, such as an open wound or a build-up of faeces or urine in the wool, in which she lays her eggs. The emerging larvae cause large lesions on the sheep, which may prove to be fatal.
The Wiltipoll is a breed of polled domestic sheep that was developed in Australia from Wiltshire Horn sheep with the infusion of Border Leicester, Perendale, Poll Dorset, and Poll Merino genetics, that are raised for meat.
The Faroese sheep is a breed of sheep native to the Faroe Islands.
The history of the domestic sheep goes back to between 11,000 and 9,000 BCE, and the domestication of the wild mouflon in ancient Mesopotamia. Sheep are among the first animals to have been domesticated by humans. These sheep were primarily raised for meat, milk, and skins. Woolly sheep began to be developed around 6000 BCE. They were then imported to Africa and Europe via trading.
Numerous procedures performed on domestic animals are usually more invasive than purely cosmetic alterations, but differ from types of veterinary surgery that are performed exclusively for health reasons. Such procedures have been grouped together under the technical term 'mutilatory' by the Royal College of Veterinary Surgeons in a report describing the reasons for their being conducted and their welfare consequences, and by others.
Sheep farming is a significant industry in New Zealand. According to 2007 figures reported by the Food and Agriculture Organization (FAO) of the United Nations, there are 39 million sheep in the country. The country has the highest density of sheep per unit area in the world. For 130 years, sheep farming was the country's most important agricultural industry, but it was overtaken by dairy farming in 1987. Sheep numbers peaked in New Zealand in 1982 to 70 million and then dropped to about 27.6 million. There are 16,000 sheep and beef farms in the country which has made the country the world's largest exporter of lambs, with 24 million finished lambs recorded every year.