Feedlots are facilities where livestock are fattened for slaughter. They are often known as feedyards or confinements. Cattle are typically raised in these facilities, but pigs, sheep, and poultry may also be raised there. A feedlot is a high-density and high-volume enterprise that manages the feeding and care of thousands to tens of thousands of animals at a time. Other synonyms for feedlots include concentrated animal feeding operation (CAFO), factory farm, and intensive livestock operation (ILO). While these facilities can increase efficiency and economic profitability for farmers, they have raised concerns about animal welfare, environmental pollution, and public health.