Pigs sit inside their pen at a farm on May 1, 2009 in Yogyakarta, Indonesia. (Photo by Ulet Ifansasti/Getty Images)

A pig reaches for food in a pig farm on July 10, 2007 in Chongqing Municipality, China. (Photo by China Photos/Getty Images)

Farmers sell piglets at a market on July 31, 2005 in Xichang of Liangshan Yi Autonomous Prefecture, Sichuan Province, southwest China. (Photo by China Photos/Getty Images)

Chinese butchers catch a pig to slaughter on January 31, 2005 in Jinzhai County, Anhui Province, China. (Photo by Cancan Chu/GettyImages)

A butcher slaughters a porket for a customer at a market on July 31, 2005 in Xichang of Liangshan Yi Autonomous Prefecture, Sichuan Province, southwest China. Roasted porket is one of the famous foods of Yi ethnic minority people. (Photo by China Photos/Getty Images)

Filipino tribal leaders kill a pig as part of their tribal ritual in protest of large scale militarization in their homeland during the celebration of Filipino indigenous peoples week in Quezon City, Philippines on August 13, 2002. (Photo by Gabriel Mistral/Getty Images)

A butcher handles slaughtered pigs at a state of the art slaughterhouse on December 15, 2005 in Mannheim, Germany. (Photo by Ralph Orlowski/Getty Images)

Villagers slaughter a pig to worship ancestors during celebration of Yangma Festival, literally “Sheep and Horse Festival” at Baoan Village on July 18, 2008 in Xiushan Tujia and Miao Autonomous County of Chongqing Municipality, China. (Photo by China Photos/Getty Images)

A butcher slaughters a pig for the 80th birthday feast of senior citizen Tian Dacui at Keda Village on July 25, 2008 in Youyang County of Chongqing Municipality, China. (Photo by China Photos/Getty Images)

Chinese butchers slaughter a pig on January 31, 2005 in Jinzhai County, Anhui Province, China. (Photo by Cancan Chu/Getty Images)

Butchers bleed slaughtered pigs at a slaughterhouse on August 3, 2005 in Kunming of Yunnan Province, southwest China. (Photo by China Photos/Getty Images)

A butcher handles slaughtered pigs at a state of the art slaughterhouse on December 15, 2005 in Mannheim, Germany. (Photo by Ralph Orlowski/Getty Images)

A butcher is seen cutting into a pigs carcass in a slaughter house on May 2, 2009 in Yogyakarta, Indonesia. (Photo by Ulet Ifansasti/Getty Images)

Chinese men dressed in ancient clothes lay animals head as sacrifices to Confucius (551-479 BC), the Chinese philosopher and educator, during a worship ceremony of the Confucius Culture Festival September 28, 2005 in Changchun of Jilin Province, China. (Photo by China Photos/Getty Images)

A man stands beside a slaughtered pig at the annual Nianzhu Festival, literally “Pig of the Year Festival”, in mountainous Wubao Township on January 6, 2008 in Chongqing Municipality, China. (Photo by China Photos/Getty Images)

A pig head used as an offering to worship ancestors is displayed before Tujia ethnic minority people perform the “Waving Hands” dancing at Houxi Township on July 25, 2008 in Youyang County of Chongqing Municipality, China. The “Waving Hands” dance is performed along with the rhythm of gong and drum, to show the movements of Tujia people labouring in fields. (Photo by China Photos/Getty Images)

Cuts of beef and pork lie in a display counter at a supermarket July 30, 2007 in Berlin, Germany. (Photo by Sean Gallup/Getty Images)

A student acts as a slaughtered pig during a performance art activity to promote animal protection on September 29, 2008 in Changchun of Jilin Province, northeast China. The event is held by Changchun Animal Protection Alliance (CAPA) to appeal for animal rights and welfare, calling on people to eat less meat. (Photo by China Photos/Getty Images)

Brian Hembstead, of Midland, Michigan, enjoys a BBQ pork rib at the 2004 World Championship BBQ Cooking Contest on May 15, 2004 in Memphis, Tennessee. Teams come to Memphis from all over the world to compete in what has become know as the Superbowl of Swine. (Photo by Mike Brown/Getty Images)