Activists of the animal rights group 'Animal Equality' take part in a solemn vigil with animals, which the activists said died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburg Gate in Berlin, Germany, October 31, 2015. REUTERS/Hannibal 

Activists of the animal rights group 'animalEQUALITY' take part in a solemn vigil with animals, which the activists said died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin, Germany, October 31, 2015. REUTERS/Hannibal 

Activists of the animal rights group 'animalEQUALITY' take part in a solemn vigil with animals, which the activists said died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin, Germany, October 31, 2015. REUTERS/Hannibal 

Activists of the animal rights group 'animalEQUALITY' take part in a solemn vigil with animals, which the activists said died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin, Germany, October 31, 2015. REUTERS/Hannibal 

Activists of the animal rights group 'animalEQUALITY' take part in a solemn vigil with animals, which the activists said died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin, Germany, October 31, 2015. REUTERS/Hannibal 

Activists of the animal rights group 'animalEQUALITY' take part in a solemn vigil with animals, which the activists said died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin, Germany, October 31, 2015. REUTERS/Hannibal 

A pig feeds its piglets at a husbandry farm in Hanoi July 23, 2015. Three decades after Vietnam started moving away from a socialist-led farm economy towards manufacturing of big-brand textiles and electronics, some of its top firms are carving out opportunities in its $37 billion agriculture and seafood sector and looking to expand overseas, helped by free trade pacts. Photo taken July 23, 2015. REUTERS/Kham 

A pig is seen inside its cage at a husbandry farm in Hanoi July 23, 2015. Three decades after Vietnam started moving away from a socialist-led farm economy towards manufacturing of big-brand textiles and electronics, some of its top firms are carving out opportunities in its $37 billion agriculture and seafood sector and looking to expand overseas, helped by free trade pacts. Photo taken July 23, 2015. REUTERS/Kham 

Chickens are seen at a husbandry farm in Hanoi July 23, 2015. Three decades after Vietnam started moving away from a socialist-led farm economy towards manufacturing of big-brand textiles and electronics, some of its top firms are carving out opportunities in its $37 billion agriculture and seafood sector and looking to expand overseas, helped by free trade pacts.Photo taken July 23, 2015. REUTERS/Kham 

A pig is seen inside its cage at a husbandry farm in Hanoi July 23, 2015. Three decades after Vietnam started moving away from a socialist-led farm economy towards manufacturing of big-brand textiles and electronics, some of its top firms are carving out opportunities in its $37 billion agriculture and seafood sector and looking to expand overseas, helped by free trade pacts. Photo taken July 23, 2015. REUTERS/Kham 

A woman cleans a duck cage at a husbandry farm in Hanoi July 23, 2015. Three decades after Vietnam started moving away from a socialist-led farm economy towards manufacturing of big-brand textiles and electronics, some of its top firms are carving out opportunities in its $37 billion agriculture and seafood sector and looking to expand overseas, helped by free trade pacts. Photo taken July 23, 2015. REUTERS/Kham 

An Aberdeen Angus breed bull is led into a corral ahead of the 129th annual Argentine Rural Society's Palermo livestock and agriculture camp exhibition, which include an extensive range of cattle, farm animals and machinery in Buenos Aires, Argentina, July 21, 2015. REUTERS/Enrique Marcarian

An Aberdeen Angus breed bull is led into a corral ahead of the 129th annual Argentine Rural Society's Palermo livestock and agriculture camp exhibition, which include an extensive range of cattle, farm animals and machinery in Buenos Aires, Argentina, July 21, 2015. REUTERS/Enrique Marcarian

A Polled Hereford breed bull is led into a corral ahead of the 129th annual Argentine Rural Society's Palermo livestock and agriculture camp exhibition, which includes an extensive range of cattle, farm animals and machinery in Buenos Aires, Argentina, July 21, 2015. REUTERS/Enrique Marcarian

An Aberdeen Angus breed bull is led into a corral ahead of the 129th annual Argentine Rural Society's Palermo livestock and agriculture camp exhibition, which include an extensive range of cattle, farm animals and machinery in Buenos Aires, Argentina, July 21, 2015. REUTERS/Enrique Marcarian

A veterinarian checks a Polled Hereford breed bull ahead of the 129th annual Argentine Rural Society's Palermo livestock and agriculture camp exhibition, which includes an extensive range of cattle, farm animals and machinery in Buenos Aires, Argentina, July 21, 2015. REUTERS/Enrique Marcarian

Veterinarians classify Polled Hereford breed bulls ahead of the 129th annual Argentine Rural Society's Palermo livestock and agriculture camp exhibition, which includes an extensive range of cattle, farm animals and machinery in Buenos Aires, Argentina, July 21, 2015. REUTERS/Enrique Marcarian

Polled Hereford breed bulls are led into a corral ahead of the 129th annual Argentine Rural Society's Palermo livestock and agriculture camp exhibition, which includes an extensive range of cattle, farm animals and machinery in Buenos Aires, Argentina July 21, 2015. REUTERS/Enrique Marcarian

A Polled Hereford breed 760-kg (1,676-lb.) bull, named Francisco, is led into a corral ahead of the 129th annual Argentine Rural Society's Palermo livestock and agriculture camp exhibition, which includes an extensive range of cattle, farm animals and machinery in Buenos Aires, Argentina, July 21, 2015. REUTERS/Enrique Marcarian

Heinrich Boell Stiftung agriculture expert Christine Chemnitz poses for a photograph in Berlin, Germany, April 28, 2015. Germans, known for their love of sausages, are eating less meat and more vegetarian food as concerns grow about health, animal welfare and the environmental cost of animal husbandry. The change in eating habits is steady rather than spectacular, but the food industry is facing up to the fact that the sausage - and meat in general - will no longer hold such a revered place in German national culture. The Greens party stirred an outcry in 2013 by proposing that canteens for public sector workers should serve only vegetarian meals one day a week. "People are tired of the many scandals and there is great interest in how animals are treated and what impact my consumption has on other parts of the world," said Christina Chemnitz, agriculture expert at the Heinrich Boell Institute, a think tank linked to the Greens party in Germany. REUTERS/Stefanie Loos 

Heinrich Boell Stiftung agriculture expert Christine Chemnitz poses for a photograph in Berlin, Germany, April 28, 2015. Germans, known for their love of sausages, are eating less meat and more vegetarian food as concerns grow about health, animal welfare and the environmental cost of animal husbandry. The change in eating habits is steady rather than spectacular, but the food industry is facing up to the fact that the sausage - and meat in general - will no longer hold such a revered place in German national culture. The Greens party stirred an outcry in 2013 by proposing that canteens for public sector workers should serve only vegetarian meals one day a week. "People are tired of the many scandals and there is great interest in how animals are treated and what impact my consumption has on other parts of the world," said Christina Chemnitz, agriculture expert at the Heinrich Boell Institute, a think tank linked to the Greens party in Germany. REUTERS/Stefanie Loos 

A bear cub leans on a breeder's leg during a rescued animal release event, in Kunming, Yunnan province, April 2, 2015. About 93 wild animals rescued from local markets and restaurants recently by police and animal protection group are being transported to a national park in Puer to be released back to the wild, according to local media. REUTERS/Wong Campion

TPX IMAGES OF THE DAY

Demonstrators hold banners as they take part in a German farmers and consumer rights activists march to protest against the Transatlantic Trade and Investment Partnership (TTIP), mass husbandry and genetic engineering in Berlin, January 17, 2015. The banner reads "Animal factories. No thank you." REUTERS/Fabrizio Bensch (GERMANY - Tags: AGRICULTURE CIVIL UNREST POLITICS) 

An activist of the animal rights group 'animalEQUALITY' holds a dead piglet as he takes part in a solemn vigil with animals, which died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin March 25, 2014. According to the organizers, around 100 activists took part in the protest. REUTERS/Fabrizio Bensch (GERMANY - Tags: SOCIETY ANIMALS) 

An activist of the animal rights group 'animalEQUALITY' holds a dead piglet as he takes part in a solemn vigil with animals, which died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin March 25, 2014. According to the organizers, around 100 activists took part in the protest. REUTERS/Fabrizio Bensch (GERMANY - Tags: SOCIETY ANIMALS) 

Activists of the animal rights group 'animalEQUALITY' take part in a solemn vigil with animals, which died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin March 25, 2014. According to the organizers, around 100 activists took part in the protest. REUTERS/Fabrizio Bensch (GERMANY - Tags: SOCIETY ANIMALS) 

Activists of the animal rights group 'animalEQUALITY' take part in a solemn vigil with animals, which died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin March 25, 2014. According to the organizers, around 100 activists took part in the protest. REUTERS/Fabrizio Bensch (GERMANY - Tags: SOCIETY ANIMALS) 

An activist of the animal rights group 'animalEQUALITY' holds a dead lamb as he takes part in a solemn vigil, with animals which died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin March 25, 2014. According to organizers, around 100 activists took part in the protest. REUTERS/Fabrizio Bensch (GERMANY - Tags: SOCIETY ANIMALS) 

Activists of the animal rights group 'animalEQUALITY' take part in a solemn vigil with animals, which died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin March 25, 2014. According to organizers, around 100 activists took part in the protest. REUTERS/Fabrizio Bensch (GERMANY - Tags: SOCIETY ANIMALS) 

An activist of the animal rights group 'animalEQUALITY' holds a dead piglet as he takes part in a solemn vigil with animals, which died in factory farming and animal experiment laboratories, to protest against intensive animal husbandry at the Brandenburger in Berlin March 25, 2014. According to the organizers, around 100 activists took part in the protest. REUTERS/Fabrizio Bensch (GERMANY - Tags: SOCIETY ANIMALS) 

A breeder checks a horse's hoof at Skaryszew horse fair February 18, 2013. Polish animal rights campaigners heckled traders at one of Europe's biggest horse-trading fairs on Monday to try to prevent them selling the animals for meat. Horse breeders have been coming to the open-air fair on the same day every year for the past three centuries, but the tradition is under pressure from activists and, this year, from concern about the Europe-wide trade in horse meat. REUTERS/Peter Andrews (POLAND - Tags: ANIMALS BUSINESS) 

Noori, a cloned Pashmina goat is held by a staff member at the Faculty of Veterinary Sciences and Animal Husbandry of Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST), in Shuhama, 25 km (16 miles) east of Srinagar March 15, 2012. Noori who weighed 1.3 kg (2.9 lb) at birth on March 9, 2012 is the world's first cloned Pashmina goat and is doing well so far, said Doctor Riaz Ahmad Shah, who heads the project at SKUAST. Pashmina goats, which grow a thick warm fleece, survive on grass in Ladakh where temperatures plunge to as low as minus 20 degrees Celsius (minus 4 degrees Fahrenheit). REUTERS/Fayaz Kabli (INDIAN-ADMINISTERED KASHMIR - Tags: ANIMALS SCIENCE TECHNOLOGY BUSINESS TEXTILE SOCIETY) 

Dr Riaz Ahmad Shah holds Noori, a cloned Pashmina goat, at the Faculty of Veterinary Sciences and Animal Husbandry of Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST), in Shuhama, 25 km (16 miles) east of Srinagar March 15, 2012. Noori who weighed 1.3 kg (2.9 lb) at birth on March 9, 2012 is the world's first cloned Pashmina goat and is doing well so far, said Dr Shah, who heads the project at SKUAST. Pashmina goats, which grow a thick warm fleece, survive on grass in Ladakh where temperatures plunge to as low as minus 20 degrees Celsius (minus 4 degrees Fahrenheit). REUTERS/Fayaz Kabli (INDIAN-ADMINISTERED KASHMIR - Tags: ANIMALS SCIENCE TECHNOLOGY BUSINESS TEXTILE SOCIETY) 

Noori, a cloned Pashmina goat, is seen at the Faculty of Veterinary Sciences and Animal Husbandry of Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST), in Shuhama, 25 km (16 miles) east of Srinagar March 15, 2012. Noori who weighed 1.3 kg (2.9 lb) at birth on March 9, 2012 is the world's first cloned Pashmina goat and is doing well so far, said Doctor Riaz Ahmad Shah, who heads the project at SKUAST. Pashmina goats, which grow a thick warm fleece, survive on grass in Ladakh where temperatures plunge to as low as minus 20 degrees Celsius (minus 4 degrees Fahrenheit). REUTERS/Fayaz Kabli (INDIAN-ADMINISTERED KASHMIR - Tags: ANIMALS SCIENCE TECHNOLOGY BUSINESS TEXTILE SOCIETY TPX IMAGES OF THE DAY) 

Noori, a cloned Pashmina goat walks inside its enclosure at the Faculty of Veterinary Sciences and Animal Husbandry of Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST), in Shuhama, 25 km (16 miles) east of Srinagar March 15, 2012. Noori who weighed 1.3 kg (2.9 lb) at birth on March 9, 2012 is the world's first cloned Pashmina goat and is doing well so far, said Doctor Riaz Ahmad Shah, who heads the project at SKUAST. Pashmina goats, which grow a thick warm fleece, survive on grass in Ladakh where temperatures plunge to as low as minus 20 degrees Celsius (minus 4 degrees Fahrenheit). REUTERS/Fayaz Kabli (INDIAN-ADMINISTERED KASHMIR - Tags: ANIMALS SCIENCE TECHNOLOGY BUSINESS TEXTILE SOCIETY) 

A photographer take pictures of Noori, a cloned Pashmina goat being held by a staff member at the Faculty of Veterinary Sciences and Animal Husbandry of Sher-e-Kashmir University of Agricultural Sciences and Technology (SKUAST), in Shuhama, 25 km (16 miles) east of Srinagar March 15, 2012. Noori who weighed 1.3 kg (2.9 lb) at birth on March 9, 2012 is the world's first cloned Pashmina goat and is doing well so far, said Doctor Riaz Ahmad Shah, who heads the project at SKUAST. Pashmina goats, which grow a thick warm fleece, survive on grass in Ladakh where temperatures plunge to as low as minus 20 degrees Celsius (minus 4 degrees Fahrenheit). REUTERS/Fayaz Kabli (INDIAN-ADMINISTERED KASHMIR - Tags: ANIMALS SCIENCE TECHNOLOGY BUSINESS TEXTILE SOCIETY) 

Olga Fernandez, a Cuban cat lover and breeder, holds a cat in her garage used as a feline enclosure in Havana May 25, 2011. Cuban cat lovers believe there is a newly identified breed of short-hair cat they call the Cuban blue. Fernandez, a member of the Cuban Association of Cat Enthusiasts, is leading an effort to breed the cats with the intent of producing first-class Cuban blues, which is to say those that more closely match the association's standards. Picture taken May 25, 2011. REUTERS/Desmond Boylan (CUBA - Tags: SOCIETY ANIMALS) 

A tourist takes pictures as breeder Lubomir Roskot feeds crocodiles at a farm in the South Moravian village of Velky Karlov May 16, 2011. The farm is part of the Jevisovice agricultural co-operative, which breeds some 215 Nile crocodiles in total, mostly for agri-tourism. REUTERS/Petr Josek (CZECH REPUBLIC - Tags: AGRICULTURE ANIMALS) 

Animal rights activist Martin Balluch, head of "Verein gegen Tierfabriken" (Association against animal factories) talks with a woman as he is sitting in a cage for 24 hours to protest against pig husbandry at Stephansplatz in Vienna May 4, 2011. REUTERS/Lisi Niesner (AUSTRIA - Tags: POLITICS CIVIL UNREST) 

Animal rights activist Martin Balluch, head of "Verein gegen Tierfabriken" (Association against animal factories) sits in a cage for 24 hours to protest against pig husbandry at Stephansplatz in Vienna May 4, 2011. REUTERS/Lisi Niesner (AUSTRIA - Tags: POLITICS CIVIL UNREST) 

Animal rights activist Martin Balluch, head of "Verein gegen Tierfabriken" (Association against animal factories) sits in a cage for 24 hours to protest against pig husbandry at Stephansplatz in Vienna May 4, 2011. REUTERS/Lisi Niesner (AUSTRIA - Tags: POLITICS CIVIL UNREST) 

Animal rights activist Martin Balluch, head of "Verein gegen Tierfabriken" (Association against animal factories) sits in a cage for 24 hours to protest against pig husbandry at Stephansplatz in Vienna May 4, 2011. REUTERS/Lisi Niesner (AUSTRIA - Tags: POLITICS CIVIL UNREST) 

Animal rights activist Martin Balluch, head of "Verein gegen Tierfabriken" (Association against animal factories) sits in a cage for 24 hours to protest against pig husbandry at Stephansplatz in Vienna May 4, 2011. REUTERS/Lisi Niesner (AUSTRIA - Tags: POLITICS CIVIL UNREST) 

Animal rights activist Martin Balluch, head of "Verein gegen Tierfabriken" (Association against animal factories) sits in a cage for 24 hours to protest against pig husbandry at Stephansplatz in Vienna May 4, 2011. REUTERS/Lisi Niesner (AUSTRIA - Tags: POLITICS CIVIL UNREST) 

Animal rights activist Martin Balluch, head of "Verein gegen Tierfabriken" (Association against animal factories) sits in a cage for 24 hours to protest against pig husbandry at Stephansplatz in Vienna May 4, 2011. REUTERS/Lisi Niesner (AUSTRIA - Tags: POLITICS CIVIL UNREST) 

Veterinarians collect semen from a stud bull at a semen Genetic laboratory in Duggan, August 27, 2010. With newly affluent consumers from Brazil to China eating more meat, Argentine ranchers are honing their centuries-old cattle-breeding traditions to meet growing global demand for semen, embryos and genetics know-how. Picture taken August 27, 2010. To match Feature ARGENTINA-BEEF/GENETICS. REUTERS/Enrique Marcarian(ARGENTINA - Tags: ANIMALS BUSINESS) 

A policeman (L) and a security guard patrol beside a notice which reads "Sealed off area. Animal epidemic. Strictly prohibited from entering", on a road leading to Shijing county on the outskirts of China's southern city of Guangzhou March 3, 2010, where an outbreak of foot-and-mouth disease occurred. China has confirmed an outbreak of foot-and-month disease among pigs in southern Guangdong province bordering Hong Kong, the official Xinhua news agency reported on Tuesday. A total of 8,382 pigs have been culled in nearby farms after 1,474 pigs were suspected of contracting the highly contagious disease on Feb 22, Xinhua cited Yu Yedong, deputy director of Guangdong Provincial Animal Husbandry and Veterinary Bureau, as saying. REUTERS/Bobby Yip (CHINA - Tags: HEALTH ENVIRONMENT ANIMALS) 

A security guard stands in front of a notice which reads "Sealed off area. Animal epidemic. Strictly prohibited from entering", on a road leading to Shijing county on the outskirts of China's southern city of Guangzhou March 3, 2010, where an outbreak of foot-and-mouth disease occurred. China has confirmed an outbreak of foot-and-month disease among pigs in southern Guangdong province bordering Hong Kong, the official Xinhua news agency reported on Tuesday. A total of 8,382 pigs have been culled in nearby farms after 1,474 pigs were suspected of contracting the highly contagious disease on Feb 22, Xinhua cited Yu Yedong, deputy director of Guangdong Provincial Animal Husbandry and Veterinary Bureau, as saying. REUTERS/Bobby Yip (CHINA - Tags: HEALTH ENVIRONMENT ANIMALS) 

Bullfighter apprentice performs with a heifer during a Tentadero in Porto Alto farm 50 km (31 miles) north of Lisbon April 25, 2009. Tentaderos are the tests to decide which female calves will be chosen to procreate the bulls used in bullfights. Tentaderos are also events that let bullfighter apprentices test their skills. Picture taken April 25, 2009. REUTERS/Jose Manuel Ribeiro (PORTUGAL ANIMALS) 

Horseman with a stick pursues a heifer during the Tentadero in Porto Alto farm 50 km (31 miles) north of Lisbon April 25, 2009. Tentaderos are the tests to decide which female calves will be chosen to procreate the bulls used in bullfights. Tentaderos are also events that let bullfighter apprentices test their skills. Picture taken April 25, 2009. REUTERS/Jose Manuel Ribeiro (PORTUGAL ANIMALS) 

A three-year old llama 'Socke' enters the living room of its owner Nicole Doepper in the western town of Muelheim January 14, 2009. 'Socke' lives in the house of Doepper since its birth, when it was injured by other animals and had a bottom part of hind leg amputated. The district veterinary office of Muelheim announced on Thursday to search an adequate animal husbandry for the llama. Picture taken January 14, 2009. REUTERS/Ina Fassbender (GERMANY) 

A three-year old llama 'Socke' is pictured in front of a mirror in the living room of its owner Nicole Doepper in the western town of Muelheim January 14, 2009. 'Socke' lives in the house of Doepper since its birth, when it was injured by other animals and had a leg amputated. The district veterinary office of Muelheim announced on Thursday to search an adequate animal husbandry for the llama. Picture taken January 14, 2009. REUTERS/Ina Fassbender (GERMANY) 

A three-year old llama 'Socke' sniffs children during a promenade in the western town of Muelheim January 14, 2009. 'Socke' lives in the house of its owner Nicole Doepper since its birth, when it was injured by other animals and had a bottom part of hind leg amputated. The district veterinary office of Muelheim announced on Thursday to search an adequate animal husbandry for the llama. Picture taken January 14, 2009. REUTERS/Ina Fassbender (GERMANY) 

A three-year old llama 'Socke' sniffs its owner Nicole Doepper in the western town of Muelheim January 14, 2009. 'Socke' lives in the house of Doepper since its birth, when it was injured by other animals and had a leg amputated. The district veterinary office of Muelheim announced on Thursday to search an adequate animal husbandry for the llama. Picture taken January 14, 2009. REUTERS/Ina Fassbender (GERMANY) 

A three-year old llama 'Socke' enters the living room of its owner Nicole Doepper in the western town of Muelheim January 14, 2009. 'Socke' lives in the house of Doepper since its birth, when it was injured by other animals and had a bottom part of hind leg amputated. The district veterinary office of Muelheim announced on Thursday to search an adequate animal husbandry for the llama. Picture taken January 14, 2009. REUTERS/Ina Fassbender (GERMANY) 

A three-year old llama 'Socke' and the dog 'Big Mac' are pictured in a dining room in the western town of Muelheim January 14, 2009. 'Socke' lives in the house of its owner Nicole Doepper since its birth, when it was injured by other animals and had a leg amputated. The district veterinary office of Muelheim announced on Thursday to search an adequate animal husbandry for the llama. Picture taken January 14, 2009. REUTERS/Ina Fassbender (GERMANY) 

A three-year old llama 'Socke' lies in a dining room in the western town of Muelheim January 14, 2009. 'Socke' lives in the house of her owner Nicole Doepper since its birth, when it was injured by other animals and had a leg amputated. The district veterinary office of Muelheim announced on Thursday to search an adequate animal husbandry for the llama. Picture taken January 14, 2009. REUTERS/Ina Fassbender (GERMANY) 

A three-year old llama 'Socke' kisses its owner Nicole Doepper in her living room in the western town of Muelheim January 14, 2009. 'Socke' lives in the house of Doepper since its birth, when it was injured by other animals and had a leg amputated. The district veterinary office of Muelheim announced on Thursday to search an adequate animal husbandry for the llama. Picture taken January 14, 2009. REUTERS/Ina Fassbender (GERMANY) 

American Bullfrogs are seen at the Jurong Frog Farm in Singapore December 11, 2008. The only frog breeder in the city-state breeds the bullfrog primarily for human consumption. REUTERS/Tan Choon Huat (SINGAPORE)