Animal husbandry

Animal husbandry is the agricultural practice of keeping and breeding captive or domesticated animals to obtain valuable products or to train them for work or services. This field covers daily care, feeding, nutrition, health management, selective breeding, assistance with birth, grooming, marketing, and the harvesting of goods like meat, milk, eggs, fiber, and hides. The primary focus is on domesticated land mammals—such as cattle, sheep, goats, horses, and pigs—and birds like chickens, ducks, and geese, which are collectively called livestock. However, the practice also extends to reptiles and amphibians (known as herpetoculture), including crocodile, snake, turtle, and frog farming; insects like bees, silkworms, maggots, and cockroaches; worms such as earthworms and leeches; and aquatic animals (aquaculture), including fish, crustaceans like shrimp, crabs, crayfish, and lobsters, mollusks like clams, oysters, abalones, geoducks, and potentially coleoids, and echinoderms, primarily sea cucumbers.

Agricultural Revolution

This practice has a long history and played a key role in the human shift from nomadic hunter-gatherer lifestyles to agrarian or pastoralist societies, which could be either settled or semi-nomadic. The domestication of vertebrates began with dogs over 17,500 years ago, before the Neolithic Revolution around 13,000 BC, when the first crops were cultivated and animals were tamed. In early Bronze Age civilizations such as Ancient Egypt, Sumeria, the Indus Valley, and China, livestock like cattle, sheep, goats, and pigs were raised on farms as supplementary products, while nomadic pastoralist tribes in Inner Asia and northern Africa relied on herding grazing animals as their main way of life. Major changes occurred during the Columbian exchange, when Old World livestock were introduced to the New World, and later in the 18th-century British Agricultural Revolution, when breeders like Robert Bakewell rapidly improved livestock breeds such as the Dishley Longhorn cattle and Lincoln Longwool sheep to produce more meat, milk, and wool.

Range of species

Today, many species—especially from the genera Bos, Ovis, Sus, Gallus, and Anas—are raised commercially in large numbers for slaughter by the meat industry, for egg production, or for milk used in dairy products. Less common species like water buffalo, deer, llama and alpaca, turkeys, quails, rabbits, and guinea pigs, along with insect farming, are raised in specific regions for food, textiles, clothing, and pharmaceuticals. Aquaculture—including freshwater and seawater fish farming (mariculture), shrimp farming, crab farming, oyster farming, and sea cucumber farming—has become widespread due to the unsustainable depletion of wild fish stocks from overharvesting and other harmful environmental effects of industrial fishing.

Animals are also raised and trained to provide services for human activities, most notably through horse domestication. Horses, donkeys, and their mule hybrids were widely used for transportation and military tasks in logistics, warfare, and law enforcement by both agrarian civilizations and nomadic empires. The horse industry—covering breeding, training, grooming, and trading—remained an essential economic sector until the early 20th century, when motor vehicles became common after the Second Industrial Revolution.

Large cattle and domestic buffalo, known collectively as oxen, were also used extensively as heavy draft animals to pull wagons and plows requiring more strength and stamina than horses, and they are still used today in many underdeveloped regions where infrastructure or terrain cannot support motorization or industrial farming. Dogs are another prominent example: they have been bred, trained, and used as guard animals and hunting companions since prehistoric times, and dog sleds remain a popular transport option in arctic wilderness areas where snowfields are too difficult or costly for motor vehicles or horses. Domesticated camels are still popular in desert regions without roads.

Environmental impact

Modern animal husbandry uses production systems suited to available land. In more developed parts of the world, subsistence farming is being replaced by intensive animal farming, where, for instance, beef cattle are kept in high-density feedlots and thousands of chickens are raised in broiler houses or battery cages. On poorer soil, such as in uplands, animals are often kept more extensively and allowed to roam widely, foraging for themselves. Large-scale animal agriculture contributes to climate change, ocean acidification, and biodiversity loss.

Feeding

Most livestock are herbivores, except for pigs and chickens, which are omnivores. Ruminants like cattle and sheep are adapted to eat grass; they can forage outdoors or be fed partly or entirely on energy- and protein-rich fodders like pelleted cereals. Pigs and poultry cannot digest the cellulose in forage and require other high-protein foods. Domesticated animals are also used alongside crops in polyculture systems, such as rice-duck and rice-fish setups.

The verb "to husband" means "to manage carefully," and it comes from an older meaning of "husband," which in the 14th century referred to owning and caring for a household or farm. Today, it means the control or judicious use of resources.