A Saint Bernard dog sits with a supporter of Democratic U.S. 2020 presidential candidate Bernie Sanders at a rally in downtown Los Angeles, California, U.S., March 23, 2019. REUTERS/Lucy Nicholson

A woman with Saint Bernard dogs waits for a show during the international pets and zoo industry exhibition Pet Expo 2019 in Riga, Latvia March 23, 2019. REUTERS/Ints Kalnins

Pope Francis caresses a St Bernard dog after the Wednesday general audience in Saint Peter's square at the Vatican, September 19, 2018. REUTERS/Max Rossi TPX IMAGES OF THE DAY

Pope Francis caresses a St Bernard dog after the Wednesday general audience in Saint Peter's square at the Vatican, September 19, 2018. REUTERS/Max Rossi

St Bernard dog sleeps as Pope Francis leads the Wednesday general audience in Saint Peter's square at the Vatican, September 19, 2018. REUTERS/Max Rossi

Belgian Valerie Luycx, a founder of the association "Les Petits Vieux" acting as home for dozens of elderly animals, including dogs, cats, pigs and goats, stands next to Yam, a 9-year-old Saint Bernard, in Chievres, Belgium August 7, 2018. Picture taken August 7, 2018. REUTERS/Yves Herman

A woman with a Saint Bernard dog arrives for the first day of the Crufts Dog Show in Birmingham, Britain, March 8, 2018. REUTERS/Darren Staples TPX IMAGES OF THE DAY

Women with Saint Bernard dogs arrive for the first day of the Crufts Dog Show in Birmingham, Britain, March 8, 2018. REUTERS/Darren Staples

A woman with a Saint Bernard dog arrives for the first day of the Crufts Dog Show in Birmingham, Britain, March 8, 2018. REUTERS/Darren Staples

An employee of the Barry Foundation and St. Bernard dogs rest on their way to the inauguration ceremony of a new breeding station at the Great Saint Bernard mountain pass in the south-western Swiss Alps, Switzerland July 14, 2017. In 2005, the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann

People walk with their St. Bernard dogs to the Great Saint Bernard mountain pass in the south-western Swiss Alps, Switzerland July 14, 2017. In 2005, the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann

Visitors watch Saint Bernard dogs in an enclosure of the new breeding station at the Great Saint Bernard mountain pass in the south-western Swiss Alps July 14, 2017. In 2005, the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann

Claudio Rosetti, director of the Fondation Barry, and St. Bernhard dog Magnum arrive with others before the inauguration ceremony of the new breeding station at the Great Saint Bernard mountain pass in the south-western Swiss Alps July 14, 2017. In 2005, the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann

Saint Bernard dogs arrive at the enclosures of the new breeding station at the Great Saint Bernard mountain pass in the south-western Swiss Alps July 14, 2017. In 2005, the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann

Saint Bernard dogs arrive before the inauguration ceremony of the new breeding station at the Great Saint Bernard mountain pass in the south-western Swiss Alps July 14, 2017. In 2005, the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann

Saint Bernard dogs sit as Jean-Michel Lonfat, Prior of the Hospice de Grand Saint Bernard, blesses the new breeding station at the Great Saint Bernard mountain pass in the south-western Swiss Alps July 14, 2017. In 2005, the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann

Saint Bernard dogs walk past Jean-Michel Lonfat, Prior of the Hospice de Grand Saint Bernard, and Claudio Rosetti, director of the Fondation Barry, after they inaugurated the new breeding station at the Great Saint Bernard mountain pass in the south-western Swiss Alps July 14, 2017. In 2005, the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann

Saint Bernard dogs stand beside Jean-Michel Lonfat, Prior of the Hospice de Grand Saint Bernard, and Claudio Rosetti, director of the Fondation Barry, as they cut a red ribbon to inaugurate the new breeding station at the Great Saint Bernard mountain pass in the south-western Swiss Alps July 14, 2017. In 2005, the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann

Saint Bernard dogs are seen tied in a class room during an international dog exhibition in Kannot, central Israel May 21, 2016. Some 850 purebred dogs from about 200 mini breeds participated in the exhibition. REUTERS/Amir Cohen

Pope Francis holds a Saint Bernard dog during the weekly audience in Saint Peter's Square at the Vatican May 18, 2016. REUTERS/Max Rossi

Lower Saxony Premier Stephan Weil (L-R), Swiss President Johann Schneider-Ammann, German Economy Minister Sigmar Gabriel and German Education Minister Johanna Wanka pose with two Saint Bernard dogs during the welcome night at the world's biggest computer and software fair CeBit in Hanover, Germany, March 14, 2016. REUTERS/NIGEL TREBLIN

Police officer Margaret Byrne pets Nala the St. Bernard dog at the polling station on the island of Inishfree, Ireland February 25, 2016. The remote island, situated off the coast of Donegal has a total of 4 people registered to vote and has gone to the polls one day earlier than the mainland. Ireland will hold a general election on February 26. REUTERS/Clodagh Kilcoyne

Nala, a St. Bernard dog waits outside the polling station on the island of Inishfree, Ireland February 25, 2016. The remote island, situated off the coast of Donegal has a total of 4 people registered to vote and has gone to the polls one day earlier than the mainland. Ireland will hold a general election on February 26. REUTERS/Clodagh Kilcoyne

Voter Philomena Currid chats to Hans Schleweck outside the voting house that she owns on the island of Inishfree, Ireland February 25, 2016. The remote island, situated off the coast of Donegal has a total of 4 people registered to vote and has gone to the polls one day earlier than the mainland. Ireland will hold a general election on February 26. REUTERS/Clodagh Kilcoyne

Supporters of Bernard Tomic of Australia hold up signs and masks during his men's singles first round match against Tobias Kamke of Germany at the Australian Open 2015 tennis tournament in Melbourne January 19, 2015. REUTERS/Thomas Peter (AUSTRALIA - Tags: SPORT TENNIS TPX IMAGES OF THE DAY)

Aristocrat, a St. Bernard from Hopewell, New Jersey, kisses his owner Linda Baker as they wait in the benching area prior to judging in the Working Group at the 137th Westminster Kennel Club Dog Show at Madison Square Garden in New York, February 12, 2013. REUTERS/Mike Segar (UNITED STATES - Tags: ANIMALS SOCIETY)

Saint-Bernard puppies play next to their mother Phybie at the Saint-Bernard kennel in Martigny January 9, 2012. The Saint-Bernard kennel in Martigny is the oldest breeding centre of the traditional pedigree in Switzerland. Four puppies, who were born on December 18, 2011, will be handed over to new owners when they reach three months. REUTERS/Denis Balibouse (SWITZERLAND - Tags: ANIMALS)

Four Saint-Bernard puppies suckle from their mother Phybie at the Saint-Bernard kennel in Martigny January 9, 2012. The Saint-Bernard kennel in Martigny is the oldest breeding centre of the traditional pedigree in Switzerland. The puppies, who were born on December 18, 2011, will be handed over to new owners when they reach three months. REUTERS/Denis Balibouse (SWITZERLAND - Tags: ANIMALS)

Eight week-old Saint Bernard puppies are fed in their enclosure at the St. Bernard Dog Museum in the south western Swiss town of Martigny, April 16, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: ANIMALS)

Keeper Carine Zamprogno plays with an eight week-old Saint Bernard puppy in an enclosure of the St. Bernard Dog Museum in the south western Swiss town of Martigny, April 16, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: ANIMALS)

Eight week-old Saint Bernard puppies play in an enclosure of the St. Bernard Dog Museum in the south western Swiss town of Martigny, April 16, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: ANIMALS)

Eight week-old Saint Bernard puppies play in an enclosure of the St. Bernard Dog Museum in the south western Swiss town of Martigny, April 16, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: ANIMALS)

Eight week-old Saint Bernard puppies sleep after playing in an enclosure of the St. Bernard Dog Museum in the south-western Swiss town of Martigny, April 16, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: ANIMALS)

Eight week-old Saint Bernard puppies play in an enclosure of the St. Bernard Dog Museum in the south-western Swiss town of Martigny, April 16, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Valentin Flauraud (SWITZERLAND - Tags: ANIMALS)

Michelle Cole from Barrington New Hampshire, owner of Doodles, a St. Bernard, holds its paw in the benching area as they wait for the breed to be judged at the 135th Westminster Kennel Club Dog Show in New York, February 15, 2011. REUTERS/Mike Segar (UNITED STATES - Tags: ANIMALS)

Two St. Bernard puppies play at an enclosure of the St. Bernard Dog Museum in the south-western Swiss town of Martigny February 6, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ANIMALS)

Visitors watch St. Bernard dog Ivoire and some of her nine seven week-old puppies at an enclosure of the St. Bernard Dog Museum in the south-western Swiss town of Martigny February 6, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ANIMALS)

A keeper plays with seven week-old Saint Bernard puppies and their mother Ivoire at an enclosure of the St. Bernard Dog Museum in the south-western Swiss town of Martigny February 6, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ANIMALS)

A keeper plays with seven week-old Saint Bernard puppies and their mother Ivoire at an enclosure of the St. Bernard Dog Museum in the south-western Swiss town of Martigny February 6, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ANIMALS)

A keeper plays with seven week-old Saint Bernard puppies and their mother Ivoire at an enclosure of the St. Bernard Dog Museum in the south-western Swiss town of Martigny February 6, 2011. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ANIMALS)

A Brussels Griffon (R) sniffs a 1-year-old St. Bernard during a regional exhibition in Russia's Siberian city of Krasnoyarsk, October 23, 2010. Some 1000 pets are taking part in the largest regional three-day show. REUTERS/Ilya Naymushin (RUSSIA - Tags: ANIMALS)

Hemp producer Bernard Rappaz plays with a dog next to his farm in Saxon near Sion July 29, 2010. Rappaz stopped his hunger strike after being allowed to go home and is now under house arrest at his farm. He was imprisoned May 12, 2010 for dishonest management and violation of narcotic law. REUTERS/Denis Balibouse (SWITZERLAND - Tags: CRIME LAW)

A Swiss Saint Bernard dog sleeps on a rug at the Hund 2010 dog exhibition in the town of Winterthur north of Zurich February 5, 2010. REUTERS/Arnd Wiegmann (SWITZERLAND - Tags: ENVIRONMENT ANIMALS)

A spectator with his Saint-Bernard dog cheers Astana rider and leader's yellow jersey Alberto Contador of Spain (2ndR) and team mate Lance Armstrong of the U.S. (L) during the 16th stage of the 96th Tour de France cycling race between Martigny and Bourg Saint Maurice, July 21, 2009. REUTERS/Bogdan Cristel (FRANCE SPORT CYCLING)

A Saint Bernard dog licks the cheek of Astana rider Yaroslav Popovych of Ukraine before the start of the 16th stage of the 96th Tour de France cycling race between Martigny and Bourg Saint Maurice, July 21, 2009. REUTERS/Eric Gaillard (SWITZERLAND SPORT CYCLING ANIMALS)

Astana rider Lance Armstrong of the U.S. pets a Saint Bernard dog before the start of the 16th stage of the 96th Tour de France cycling race between Martigny and Bourg Saint Maurice, July 21, 2009. REUTERS/Eric Gaillard (SWITZERLAND SPORT CYCLING)

Astana rider and leader's yellow jersey Alberto Contador of Spain keeps a Saint Bernard dog on a leash before the start of the 16th stage of the 96th Tour de France cycling race between Martigny and Bourg Saint Maurice, July 21, 2009.REUTERS/Eric Gaillard (SWITZERLAND SPORT CYCLING)

Astana rider and leader's yellow jersey holder Alberto Contador of Spain (C) keeps a Saint Bernard dog on a leash before the start of the 16th stage of the 96th Tour de France cycling race between Martigny and Bourg Saint Maurice, July 21, 2009. REUTERS/Eric Gaillard (SWITZERLAND SPORT CYCLING IMAGES OF THE DAY)

A Saint Bernard dog licks the cheek of Astana rider Yaroslav Popovych of Ukraine as his team mate Lance Armstrong (R) of the U.S. looks on before the start of the 16th stage of the 96th Tour de France cycling race between Martigny and Bourg Saint Maurice, July 21, 2009. REUTERS/Eric Gaillard (SWITZERLAND SPORT CYCLING)

Astana rider Alberto Contador of Spain looks at a Saint-Bernard dog as he wins the 15th stage of the 96th Tour de France cycling race between Pontarlier and Verbier July 19, 2009. REUTERS/Eric Gaillard (SWITZERLAND SPORT CYCLING)

Astana rider Alberto Contador of Spain shares the podium with a Saint Bernard dog after winning the 15th stage of the 96th Tour de France cycling race between Pontarlier and Verbier, July 19, 2009. REUTERS/Eric Gaillard (SWITZERLAND)

Six fifteen-day-old Saint Bernard puppies sleep in a box at the breeding kennel of the Barry Foundation in the south-western Swiss town of Martigny June 4, 2009. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND ANIMALS SOCIETY ENVIRONMENT)

Two fifteen-day-old Saint Bernard puppies sleep in a box at the breeding kennel of the Barry Foundation in the south-western Swiss town of Martigny June 4, 2009. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND ENVIRONMENT ANIMALS SOCIETY)

Two fifteen-day-old Saint Bernard puppies sleep in a box at the breeding kennel of the Barry Foundation in the south-western Swiss town of Martigny June 4, 2009. In 2005 the non-profit Barry Foundation took over the breeding kennel from the Hospice at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND ENVIRONMENT ANIMALS SOCIETY)

Tourists stop to look at two Saint Bernard dogs Katy and Salsa (R) after their arrival at the Great Saint Bernard mountain pass (2473 metres/8114 ft. altitude) in the south-western Swiss Alps June 4, 2009. In 2005 the non-profit Barry Foundation in the south-western town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND ANIMALS SOCIETY ENVIRONMENT)

A tourist from Vietnam poses with Saint Bernard dog Salsa at the Great Saint Bernard mountain pass at an altitude of 2,473 metres (8,114 ft.) in the southwestern Swiss Alps June 4, 2009. In 2005 the non-profit Barry Foundation in the southwestern town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND ENVIRONMENT ANIMALS TRAVEL)

Saint Bernard dog Salsa sits at the Great Saint Bernard mountain pass at an altitude of 2,473 metres (8,114 ft.) in the southwestern Swiss Alps June 4, 2009. In 2005 the non-profit Barry Foundation in the southwestern town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND ENVIRONMENT ANIMALS)

Saint Bernard dog Salsa sits at the Great Saint Bernard mountain pass at an altitude of 2,473 metres (8,114 ft.) in the southwestern Swiss Alps June 4, 2009. In 2005 the non-profit Barry Foundation in the southwestern town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND ENVIRONMENT ANIMALS)

Photographers take pictures of Saint Bernard dogs Katy and Salsa (R) sitting on the snow after their arrival at the Great Saint Bernard mountain pass at an altitude of 2,473 metres (8,114 ft.) in the southwestern Swiss Alps June 4, 2009. In 2005 the non-profit Barry Foundation in the southwestern town of Martigny took over the breeding kennel from the Great Saint Bernard Hospice to continue the 300-year-old tradition of breeding the famous dogs, which return to their origin on the mountain pass during the summer months. REUTERS/Arnd Wiegmann (SWITZERLAND ENVIRONMENT ANIMALS)