Livestock
Livestock are the domesticated animals raised in an agricultural setting in order to provide labour and produce diversified products for consumption such as meat, eggs, milk, fur, leather, and wool. The term is sometimes used to refer solely to animals who are raised for consumption, and sometimes used to refer solely to farmed ruminants, such as cattle, sheep, and goats.[1] Horses are considered livestock in the United States.[2] The USDA classifies pork, veal, beef, and lamb (mutton) as livestock, and all livestock as red meat. Poultry and fish are not included in the category.[3] The latter is likely due to the fact that fish products are not governed by the USDA, but by the FDA.
For other uses, see Livestock (disambiguation).
The breeding, maintenance, slaughter and general subjugation of livestock, called animal husbandry, is a part of modern agriculture and has been practiced in many cultures since humanity's transition to farming from hunter-gatherer lifestyles. Animal husbandry practices have varied widely across cultures and time periods. It continues to play a major economic and cultural role in numerous communities.
Livestock farming practices have largely shifted to intensive animal farming.[4] Intensive animal farming increases the yield of the various commercial outputs, but also negatively impacts animal welfare, the environment, and public health.[5] In particular, beef, dairy and sheep are an outsized source of greenhouse gas emissions from agriculture.
Predation[edit]
Livestock farmers have often dealt with natural world animals' predation and theft by rustlers. In North America, animals such as gray wolves, grizzly bears, cougars, and coyotes are sometimes considered a threat to livestock. In Eurasia and Africa, predators include wolves, leopards, tigers, lions, dholes, Asiatic black bears, crocodiles, spotted hyenas, and other carnivores. In South America, feral dogs, jaguars, anacondas, and spectacled bears are threats to livestock. In Australia, dingoes, foxes, and wedge-tailed eagles are common predators, with an additional threat from domestic dogs who may kill in response to a hunting instinct, leaving the carcass uneaten.[25][26]
Disease[edit]
Good husbandry, proper feeding, and hygiene are the main contributors to animal health on farms, bringing economic benefits through maximised production. When, despite these precautions, animals still become sick, they are treated with veterinary medicines, by the farmer and the veterinarian. In the European Union, when farmers treat the animals, they are required to follow the guidelines for treatment and to record the treatments given.[27]
Animals are susceptible to a number of diseases and conditions that may affect their health. Some, like classical swine fever[28] and scrapie[29] are specific to one population of animals, while others, like foot-and-mouth disease affect all cloven-hoofed animals.[30] Where the condition is serious, governments impose regulations on import and export, on the movement of livestock, quarantine restrictions and the reporting of suspected cases. Vaccines are available against certain diseases, and antibiotics are widely used where appropriate.
At one time, antibiotics were routinely added to certain compound foodstuffs to promote growth, but this is now considered poor practice in many countries because of the risk that it may lead to antibiotic resistance.[31] Animals living under intensive conditions are particularly prone to internal and external parasites; increasing numbers of sea lice are affecting farmed salmon in Scotland.[32] Reducing the parasite burdens of livestock results in increased productivity and profitability.[33]
According to the Special Report on Climate Change and Land, livestock diseases are expected to get worse as climate change increases temperature and precipitation variability.[34]