The story of how pigs came to be kept in enclosures shows how the idea of animals being property gradually crystallized into more extreme (and unjust) forms. At first, colonial farmers treated pigs largely as a possession but also somewhat as a wild animal, letting them roam freely. However, when this interrupted the way of life they were attempting to establish, pigs were treated more like possessions and less like living beings, beginning a long process that has eventually resulted in the factory farms of today.