A feedlot or feedyard is a type of animal feeding operation which is used for finishing livestock, notably beef cattle, prior to slaughter. Large beef feedlots are called Concentrated Animal Feeding Operations. They may contain thousands of animals in an array of pens. Most feedlots require some type of governmental permit and must have plans in place to deal with the large amount of waste that is generated. The Environmental Protection Agency has authority under the Clean Water Act to regulate all animal feeding operations in the United States. This authority is delegated to individual states in some cases. Increasing numbers of cattle feedlots are utilizing out-wintering pads made of timber residue bedding in their operations. Nutrients are retained in the waste timber and livestock effluent and can be recycled within the farm system after use.

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