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Residual feed intake (sometimes shortened in literature to RFI) is a resource allocation theory index [clarification needed (what is a "resource allocation theory index"?)] used to calculate the feed efficiency of growing cattle. It was developed by Robert M. Koch in 1963 as an answer to the difficulties of using a feed conversion ratio to ...
Feed conversion ratio (FCR) is the ratio of inputs to outputs; it is the inverse of "feed efficiency" which is the ratio of outputs to inputs. [2] FCR is widely used in hog and poultry production, while FE is used more commonly with cattle. [2] Being a ratio the FCR is dimensionless, that is, it is not affected by the units of measurement used ...
Feedlot. A feedlot or feed yard is a type of animal feeding operation (AFO) which is used in intensive animal farming, notably beef cattle, but also swine, horses, sheep, turkeys, chickens or ducks, prior to slaughter. Large beef feedlots are called concentrated animal feeding operations (CAFO) in the United States [ 1 ] and intensive livestock ...
Cattle feeding. There are different systems of feeding cattle in animal husbandry. For pastured animals, grass is usually the forage that composes the majority of their diet. In turn, this grass-fed approach is known for producing meat with distinct flavor profiles. Cattle reared in feedlots are fed hay supplemented with grain, soy and other ...
Animal feed is food given to domestic animals, especially livestock, in the course of animal husbandry. There are two basic types: fodder and forage. Used alone, the word feed more often refers to fodder. Animal feed is an important input to animal agriculture, and is frequently the main cost of the raising or keeping of animals.
Beta-adrenergic agonists, or β-agonists, are non-hormonal growth promotants that help animals put on muscle instead of fat. The more scientifically accepted name for agents of this class is a repartitioning agent, not a growth promotor. Ractopamine (brand names include Optaflexx and Paylean) and zilpaterol (brand name Zilmax) received FDA ...
Bovine spongiform encephalopathy (BSE), commonly known as mad cow disease, is an incurable and invariably fatal neurodegenerative disease of cattle. [2] Symptoms include abnormal behavior, trouble walking, and weight loss. [1] Later in the course of the disease, the cow becomes unable to function normally. [1]
Animal husbandry is the branch of agriculture concerned with animals that are raised for meat, fibre, milk, or other products. It includes day-to-day care, management, production, nutrition, selective breeding, and the raising of livestock. Husbandry has a long history, starting with the Neolithic Revolution when animals were first domesticated ...