Editing Breeding back (section)

=== Pigs ===
[[Boar–pig hybrid]]s, which are hybrids of [[wild boar]]s and [[domestic pig]]s and exist as an invasive species throughout Eurasia, the Americas, Australia, and in other places where European settlers imported wild boars to use as game animals, are also used for selective breeding to re-create the type of pigs represented in prehistoric artworks dating from the [[Iron Age]] and earlier in ancient Europe. A project to create them, under the name of the '''Iron Age pig''', started in the early 1980s by crossing a male wild boar with a [[Tamworth pig|Tamworth]] sow to produce an animal resembling what Iron Age pigs are believed to have looked like.<ref name="book">{{cite book |title=Choosing and Keeping Pigs |last=McDonald-Brown |first=Linda |publisher=Firefly Books |date=2009 |isbn=978-1-55407-469-3 }}</ref> Iron Age pigs are generally only raised in Europe for the specialty meat market, and in keeping with their heritage are generally more aggressive and harder to handle than [[purebred]] domesticated pigs.<ref name="book"/>