The domestic pig, known in some areas as the hog, is a domesticated livestock animal, farmed for meat (pork, bacon, ham, sausages, etc.)
Most domestic pigs have rather sparse hair covering on their skin, although woolly coated breeds are known (Mangalitsa pig), and some were popular in the past.
The domestic pig is most often treated as a subspecies of its wild ancestor, the wild boar, and in this case it is given the scientific name Sus scrofa domesticus. Some taxonomists treat the domestic pig as a separate species, when it is called Sus domesticus, and wild boar is S. scrofa. Wild boar were in human association as early as 13,000–12,700 BP. Escaped domestic pigs have become feral in many parts of the world (for example, New Zealand) and have caused substantial environmental damage.