A farmer holds a piglet in Tauche, Germany, January 30, 2020. REUTERS/Axel Schmidt

A farmer holds a piglet in Tauche, Germany, January 30, 2020. REUTERS/Axel Schmidt

A butcher holds up a piglet for sale during a Christmas Eve auction in Smithfield market in London, Britain December 24, 2019. REUTERS/Hannah McKay TPX IMAGES OF THE DAY

Hog farmer Mike Paustian looks at some of his piglets in his farm in Walcott, Iowa, U.S., May 17, 2019. Picture taken May 17, 2019. REUTERS/Tom Polansek

Hog farmer Mike Paustian interacts with some of his piglets in his farm in Walcott, Iowa, U.S., May 17, 2019. Picture taken May 17, 2019. REUTERS/Tom Polansek

Children feed piglets at an animal farm that encourages customer to buy food to feed them or buy them, in Taoyuan, Taiwan January 31, 2019. Picture taken January 31, 2019. REUTERS/Tyrone Siu

Piglets are seen at an animal farm that encourages customer to buy food to feed them or buy them, in Taoyuan, Taiwan January 31, 2019. Picture taken January 31, 2019. REUTERS/Tyrone Siu

Piglets are seen at an animal farm that encourages customers to buy food to feed them or buy them, in Taoyuan, Taiwan January 31, 2019. Picture taken January 31, 2019. REUTERS/Tyrone Siu

A staff member feeds milk to piglets at the Green Island Holiday Farm ahead of the upcoming Lunar New Year of the Pig in Zhangjiakou, Hebei Province, China January 27, 2019. REUTERS/Thomas Peter

A staff member feeds milk to a piglet at the Green Island Holiday Farm ahead of the upcoming Lunar New Year of the Pig in Zhangjiakou, Hebei Province, China, January 27, 2019. REUTERS/Thomas Peter

PETA activists wearing masks of pigs protest against castration of piglets at the opening day of the International Green Week (Internationale Gruene Woche) agriculture and food fair in Berlin, Germany, January 18, 2019. REUTERS/Fabrizio Bensch TPX IMAGES OF THE DAY

PETA activists wearing masks of pigs protest against castration of piglets at the opening day of the International Green Week (Internationale Gruene Woche) agriculture and food fair in Berlin, Germany, January 18, 2019. REUTERS/Fabrizio Bensch

PETA activists wearing masks of pigs protest against castration of piglets at the opening day of the International Green Week (Internationale Gruene Woche) agriculture and food fair in Berlin, Germany, January 18, 2019. REUTERS/Fabrizio Bensch

PETA activists wearing masks of pigs protest against castration of piglets at the opening day of the International Green Week (Internationale Gruene Woche) agriculture and food fair in Berlin, Germany, January 18, 2019. REUTERS/Fabrizio Bensch

A piglet lies on straw at Siegfried Marth's organical breeding farm in Hagensdorf, Austria, October 17, 2018. REUTERS/Heinz-Peter Bader

A piglet's tail is seen at Siegfried Marth's organical breeding farm in Hagensdorf, Austria, October 17, 2018. REUTERS/Heinz-Peter Bader

A piglet's tail is seen at Siegfried Marth's organical breeding farm in Hagensdorf, Austria, October 17, 2018. REUTERS/Heinz-Peter Bader

A cock walks by piglets at Siegfried Marth's organical breeding farm in Hagensdorf, Austria, October 17, 2018. REUTERS/Heinz-Peter Bader

An animal rights activist from the French group "Boucherie Abolition" holds a dead piglet collected at a slaughterhouse during a protest in front of a butcher's shop in Paris, France, September 22, 2018. The slogan on the T-shirt reads "Butcher, not a job". REUTERS/Christian Hartmann

An animal rights activist from the French group "Boucherie Abolition" holds a dead piglet collected at a slaughterhouse during a protest in front of a butcher's shop in Paris, France, September 22, 2018. The slogan on the T-shirt reads "Butcher, not a job". REUTERS/Christian Hartmann

Archery - 2018 Asian Games - Women’s Team Recurve, Quarterfinals - GBK Archery Field, Jakarta, Indonesia - August 25, 2018 - The images of Winnie the Pooh and Piglet are seen on the shoulderpad of Zhang Xinyan of China. REUTERS/Cathal Mcnaughton TPX IMAGES OF THE DAY

Archery - 2018 Asian Games - Women’s Team Recurve, Quarterfinals - GBK Archery Field, Jakarta, Indonesia - August 25, 2018 - The images of Winnie the Pooh and Piglet are seen on the shoulderpad of Zhang Xinyan of China. REUTERS/Cathal Mcnaughton

Piglets drink milk from a sow inside Guangxi Yangxiang's high-rise pig farm at Yaji Mountain Forest Park in Guangxi, China, March 21, 2018. Picture taken March 21, 2018. REUTERS/Dominique Patton

Piglets drink milk from a sow at Guangxi Yangxiang's high-rise pig farm in Yaji Mountain Forest Park, Guangxi, China, March 21, 2018. Picture taken March 21, 2018. REUTERS/Thomas Suen

Piglets drink milk from a sow at Guangxi Yangxiang's high-rise pig farm in Yaji Mountain Forest Park, Guangxi, China, March 21, 2018. Picture taken March 21, 2018. REUTERS/Thomas Suen

Newborn piglets stay warm inside Guangxi Yangxiang's high-rise pig farm at Yaji Mountain Forest Park in Guangxi, China, March 21, 2018. Picture taken March 21, 2018. REUTERS/Dominique Patton

Newborn piglets stay warm inside Guangxi Yangxiang's high-rise pig farm at Yaji Mountain Forest Park in Guangxi, China, March 21, 2018. Picture taken March 21, 2018. REUTERS/Dominique Patton

A sow and her piglets are seen in their stall at the 2018 Paris International Agricultural Show as farmers and their animals prepare for the opening of the farm show in Paris, France, February 23, 2018. REUTERS/Stephane Mahe

Piglets are pictured in a production module at the pig farm Granjas Carrol de Mexico (GCM), in Cuyoaco, Puebla state, Mexico August 4, 2017. Picture taken August 4, 2017. REUTERS/Edgard Garrido TPX IMAGES OF THE DAY

Piglets get hot next to a sow in a production module at the pig farm Granjas Carrol de Mexico (GCM), in Cuyoaco, Puebla state, Mexico, August 4, 2017. Picture taken August 4, 2017. REUTERS/Edgard Garrido

Piglets get hot in a production module at the pig farm Granjas Carrol de Mexico (GCM), in Cuyoaco, Puebla state, Mexico August 4, 2017. Picture taken August 4, 2017. REUTERS/Edgard Garrido

A piglet suckles milk from a sow in a production module at the pig farm Granjas Carrol de Mexico (GCM), in Cuyoaco, Puebla state, Mexico August 4, 2017. Picture taken August 4, 2017. REUTERS/Edgard Garrido

A veterinarian holds a newborn piglet in a production module at the pig farm Granjas Carrol de Mexico (GCM), in Cuyoaco, Puebla state, Mexico August 4, 2017. Picture taken August 4, 2017. REUTERS/Edgard Garrido

A piglet is pictured next to a sow in a production module at the pig farm Granjas Carrol de Mexico (GCM), in Cuyoaco, Puebla state, Mexico August 4, 2017. Picture taken August 4, 2017. REUTERS/Edgard Garrido

Piglets are pictured next to a sow in a production module at the pig farm Granjas Carrol de Mexico (GCM), in Cuyoaco, Puebla state, Mexico August 4, 2017. Picture taken August 4, 2017. REUTERS/Edgard Garrido

French President Emmanuel Macron pets piglets during a visit to the Vaseix agricultural college in Verneuil-sur-Vienne, France, June 9, 2017 as part of a two-day visit in the Haute-Vienne department. REUTERS/Pascal Lachenaud/Pool

Piglets are feed by their mother on the side of a road in Huay Xai, Bokeo province, Laos April 25, 2017. REUTERS/Jorge Silva

Pigs are seen at a farm in Neihuang county, Henan province, China, September 12, 2016. Picture taken September 12, 2016. REUTERS/Dominique Patton

Animal rights activists from Igualdad Animal (Animal Equality) hold up dead animals, including a piglet, during a demonstration to protest treatment of animals and draw attention to International Animal Rights Day, which organisers say is celebrated alongside International Human Rights Day, in Madrid, Spain December 10, 2016. REUTERS/Javier Barbancho

A tiger yawns while a piglet stands beside it at Sriracha Tiger Zoo, in Chonburi province, Thailand, June 7, 2016. REUTERS/Chaiwat Subprasom/File photo

A person holds a piglet at a shelter set up at the San Bernardino County Fairgrounds due to the Blue Cut fire in Victorville, California U.S., August 18, 2016. REUTERS/Mario Anzuoni

A pig and its farrow of piglets are pictured at a shelter set up at the San Bernardino County Fairgrounds due to the Blue Cut fire in Victorville, California U.S., August 18, 2016. REUTERS/Mario Anzuoni

A tiger yawns next to a piglet at the Sriracha Tiger Zoo, in Chonburi province, Thailand, June 7, 2016. REUTERS/Chaiwat Subprasom TPX IMAGES OF THE DAY

A tiger cub and piglets suckle from a sow at the Sriracha Tiger Zoo, in Chonburi province, Thailand, June 7, 2016. REUTERS/Chaiwat Subprasom

A Porchetta roasted piglet is displayed at the Boucherie St Francois butcher shop in the old city of Nice, France, March 30, 2016. REUTERS/Eric Gaillard

Venezuelan soldiers castrate a piglet at the military farm in La Placera, Maracay, in the state of Aragua March 8, 2016. REUTERS/Marco Bello

Animal rights activists from Igualdad Animal (Animal Equality) hold up dead animals, including a piglet (C), during a demonstration to protest the treatment of animals and draw attention to International Animal Rights Day, which organisers say is celebrated alongside International Human Rights Day, in Madrid, Spain, December 12, 2015. REUTERS/Paul Hanna

Animal rights activists from Igualdad Animal (Animal Equality) hold up dead animals, including a piglet (C), during a demonstration to protest the treatment of animals and draw attention to International Animal Rights Day, which organisers say is celebrated alongside International Human Rights Day, in Madrid, Spain, December 12, 2015. REUTERS/Paul Hanna

Pigs and a water buffalo are brought to higher ground in Sta Rosa, Nueva Ecija in northern Philippines October 19, 2015 after it was hit by Typhoon Koppu. The typhoon swept across the northern Philippines killing at least nine people as trees, power lines and walls were toppled and flood waters spread far from riverbeds, but tens of thousands of people were evacuated in time. Officials fear the death toll may rise after Typhoon Koppu tore through the main island of Luzon on Sunday leaving several remote towns and villages isolated due to flash floods and toppled trees and boulders blocking roads. REUTERS/Erik De Castro

A pig and her piglets stay on higher ground after being rescued, in Sta Rosa, Nueva Ecija in northern Philippines, October 19, 2015, after it was hit by Typhoon Koppu. Powerful typhoon Koppu ploughed into the northeastern Philippines before dawn on Sunday destroying homes and displacing 10,000 people and whipping up coastal surges four meters (12 feet) high, disaster agency officials said. There were no reports of casualties after the category four typhoon, with central destructive winds of 175 kph (109 mph), making landfall near the town of Casiguran in the Aurora province. REUTERS/Erik De Castro

Vietnamese women of Hmong ethnicity sell piglets at a weekend market in Dong Van district, north of Hanoi, Vietnam September 20, 2015. REUTERS/Kham

Piglets are seen in their stall at the pig farm owned by French farmer Laurent Ulrich (not pictured) in Kleinfrankenheim near Strasbourg, France, August 19, 2015. A price boycott by French meat processing firms against higher pork prices threatens to derail a government plan to support angry livestock farmers, who blockaded roads last month. REUTERS/Vincent Kessler

Piglets are seen in their stall at the pig farm owned by French farmer Laurent Ulrich (not pictured) in Kleinfrankenheim near Strasbourg, France, August 19, 2015. A price boycott by French meat processing firms against higher pork prices threatens to derail a government plan to support angry livestock farmers, who blockaded roads last month. REUTERS/Vincent Kessler

Piglets are seen in their stall at the pig farm owned by French farmer Laurent Ulrich (not pictured) in Kleinfrankenheim near Strasbourg, France, August 19, 2015. A price boycott by French meat processing firms against higher pork prices threatens to derail a government plan to support angry livestock farmers, who blockaded roads last month. REUTERS/Vincent Kessler

Piglets are seen in their stall at the pig farm owned by French farmer Laurent Ulrich in Kleinfrankenheim near Strasbourg, France, August 19, 2015. A price boycott by French meat processing firms against higher pork prices threatens to derail a government plan to support angry livestock farmers, who blockaded roads last month. REUTERS/Vincent Kessler

French farmer Laurent Ulrich holds a piglet at his pig farm in Kleinfrankenheim near Strasbourg, France, August 19, 2015. A price boycott by French meat processing firms against higher pork prices threatens to derail a government plan to support angry livestock farmers, who blockaded roads last month. REUTERS/Vincent Kessler

French farmer Laurent Ulrich holds a day-old piglet in the nursery of his pig farm in Kleinfrankenheim near Strasbourg, France, August 19, 2015. A price boycott by French meat processing firms against higher pork prices threatens to derail a government plan to support angry livestock farmers, who blockaded roads last month. REUTERS/Vincent Kessler

Day-old piglets stand under a heating lamp at the pig farm owned by French farmer Laurent Ulrich in Kleinfrankenheim, near Strasbourg, France, August 19, 2015. A price boycott by French meat processing firms against higher pork prices threatens to derail a government plan to support angry livestock farmers, who blockaded roads last month. REUTERS/Vincent Kessler

Piglets are seen in their stall at the pig farm owned by French farmer Laurent Ulrich (not pictured) in Kleinfrankenheim near Strasbourg, France, August 19, 2015. A price boycott by French meat processing firms against higher pork prices threatens to derail a government plan to support angry livestock farmers, who blockaded roads last month. REUTERS/Vincent Kessler

French farmer Laurent Ulrich holds a piglet at his pig farm in Kleinfrankenheim near Strasbourg, France, August 19, 2015. A price boycott by French meat processing firms against higher pork prices threatens to derail a government plan to support angry livestock farmers, who blockaded roads last month. REUTERS/Vincent Kessler