Centre Manager Steve Craddock poses for a photograph at Battersea Dogs and Cats Home, in London, Britain June 9, 2020. Picture taken June 9, 2020. REUTERS/John Sibley

Rehoming and Welfare Assistant Marina Elands takes Charlie, a Bichon Frise, for her daily exercise at Battersea Dogs and Cats Home, in London, Britain June 9, 2020. Picture taken June 9, 2020. REUTERS/John Sibley

Rehoming and Welfare Assistant Marina Elands takes Paddy, a mongrel, for a walk at Battersea Dogs and Cats Home, in London, Britain June 9, 2020. Picture taken June 9, 2020. REUTERS/John Sibley

Centre Manager Steve Craddock poses for a photograph at Battersea Dogs and Cats Home, in London, Britain, June 9, 2020. Picture taken June 9, 2020. REUTERS/John Sibley

Rehoming and Welfare Assistant Marina Elands takes Paddy, a mongrel, for a walk at Battersea Dogs and Cats Home, in London, Britain June 9, 2020. Picture taken June 9, 2020. REUTERS/John Sibley

Paddy, a mongrel, is seen in his kennel at Battersea Dogs and Cats Home, in London, Britain June 9, 2020. Picture taken June 9, 2020. REUTERS/John Sibley

Rehoming and Welfare Assistant Marina Elands takes Charlie, a Bichon Frise, for her daily exercise at Battersea Dogs and Cats Home, in London, Britain June 9, 2020. Picture taken June 9, 2020. REUTERS/John Sibley

Rehoming and Welfare Assistant Marina Elands takes Charlie, a Bichon Frise, for her daily exercise at Battersea Dogs and Cats Home, in London, Britain June 9, 2020. Picture taken June 9, 2020. REUTERS/John Sibley

Rehoming and Welfare Assistant Marina Elands takes Charlie, a Bichon Frise, for her daily exercise at Battersea Dogs and Cats Home, in London, Britain June 9, 2020. Picture taken June 9, 2020. REUTERS/John Sibley

Camilla, Duchess Of Cornwall with Willow during her visit to Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Camilla, Duchess Of Cornwall with Willow during her visit to Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Camilla, Duchess Of Cornwall arrives for her visit Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Beth, the Duchess Of Cornwall's dog competes an agility course during her visit to Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Beth, the Duchess Of Cornwall's dog competes an agility course during her visit to Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Beth, the Duchess Of Cornwall's dog competes an agility course during her visit to Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Camilla (R), Duchess Of Cornwall with her dog Beth during her visit to Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Camilla, Duchess Of Cornwall with her dog Beth and dog handler Ali Taylor during her visit to Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Camilla, Duchess Of Cornwall with Luna the cat during her visit to Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Camilla, Duchess Of Cornwall with Luna the cat during her visit to Battersea Dogs and Cats Home in Old Windsor, Britain, February 1, 2017. REUTERS/Chris Jackson/Pool

Britain's Camilla, Duchess of Cornwall, meets Mickey and Emma Hunkin, during her visit to Battersea Dogs & Cats Home in London, Britain September 7, 2016. REUTERS/Eddie Mulholland/Pool

Britain's Camilla, Duchess of Cornwall, speaks with Chelsea Pensioners Bob Leece (R) and Audrey Merton during her visit to Battersea Dogs & Cats Home in London, Britain September 7, 2016. REUTERS/Eddie Mulholland/Pool

Britain's Queen Elizabeth and and Prince Philip attend the opening of the new Mary Tealby dog kennels at Battersea Dogs & Cats Home in London March 17, 2015. REUTERS/Ben Stansall/pool (BRITAIN - Tags: ROYALS ENTERTAINMENT ANIMALS)

Dogs look through the bars of his cage at Battersea Dogs and Cats Home in London, February 19, 2015. REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

A dog looks through the bars of his cage at Battersea Dogs and Cats Home in London, February 19, 2015. REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

A dog sits under a sign, at Battersea Dogs and Cats Home in London, February 19, 2015. REUTERS/Neil Hall (BRITAIN - Tags: ENTERTAINMENT SOCIETY)

A visitor looks at a dog at Battersea Dogs and Cats Home in London, February 19, 2015. REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

A dog looks through the bars of his cage at Battersea Dogs and Cats Home in London, February 19, 2015. REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

Dog Socialiser Ashley Hunter comforts a dog at Battersea Dogs and Cats Home in London, February 19, 2015. REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

Dog Socialiser Ashley Hunter comforts a dog at Battersea Dogs and Cats Home in London, February 19, 2015. REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

Owners Hollie Oppe (L) and Amanda Oppe pose with Marjorie an old tyme bull dog which was a former "backstreet breeder" at Battersea Dogs and Cats Home in London, February 19, 2015. Marjorie was rescued, nursed back to health and offered for adoption by Battersea Dogs Home after she was used to breed over and over again to produce puppies for sale REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

Owners Hollie Oppe (L) and Amanda Oppe pose with Marjorie an old tyme bull dog which was a former "backstreet breeder" at Battersea Dogs and Cats Home in London, February 19, 2015. Marjorie was rescued, nursed back to health and offered for adoption by Battersea Dogs Home after she was used to breed over and over again to produce puppies for sale REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

Marjorie an old tyme bull dog which was a former "backstreet breeder" rests inside Battersea Dogs and Cats Home in London, February 19, 2015. Marjorie was rescued, nursed back to health and offered for adoption by Battersea Dogs Home after she was used to breed over and over again to produce puppies for sale REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

Marjorie an old tyme bull dog which was a former "backstreet breeder", is walked outside Battersea Dogs and Cats Home in London, February 19, 2015. Marjorie was rescued, nursed back to health and offered for adoption by Battersea Dogs Home after she was used to breed over and over again to produce puppies for sale REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

Owner Hollie Oppe walks Marjorie an old tyme bull dog which was a former "backstreet breeder" outside Battersea Dogs and Cats Home in London, February 19, 2015. Marjorie was rescued, nursed back to health and offered for adoption by Battersea Dogs Home after she was used to breed over and over again to produce puppies for sale REUTERS/Neil Hall (BRITAIN - Tags: SOCIETY)

Britain's Prime Minister David Cameron (R), takes Bertie, a nine month old Yorkshire Terrier from volunteer James Moore during his visit to Battersea Dogs and Cats Home in London August 13, 2013. Moore is the home's 1000th volunteer, since it's founding in 1860 by Mary Tealby. REUTERS/Alastair Grant/pool (BRITAIN - Tags: ANIMALS POLITICS)

Britain's Prime Minister David Cameron (R), takes Bertie, a nine month old Yorkshire Terrier from volunteer James Moore during his visit to Battersea Dogs and Cats Home in London August 13, 2013. Moore is the home's 1000th volunteer, since it's founding in 1860 by Mary Tealby. REUTERS/Alastair Grant/pool (BRITAIN - Tags: ANIMALS POLITICS)

Britain's Prime Minister David Cameron throws a ball for Phyllis, a 10-year-old mongrel, during his visit to Battersea Dogs and Cats Home in London August 13, 2013. Cameron visited the home which was started in 1860 by Mary Tealby, to celebrate the announcement of their 1000th volunteer. REUTERS/Alastair Grant/pool (BRITAIN - Tags: ANIMALS POLITICS)

Britain's Prime Minister David Cameron (C) poses with staff during his visit to Battersea Dogs and Cats Home in London August 13, 2013. Cameron visited the home which was started in 1860 by Mary Tealby, to celebrate the announcement of their 1000th volunteer. REUTERS/Alastair Grant/pool (BRITAIN - Tags: ANIMALS POLITICS)

Britain's Prime Minister David Cameron (R), takes Bertie, a nine month old Yorkshire Terrier from volunteer James Moore during his visit to Battersea Dogs and Cats Home in London August 13, 2013. Moore is the home's 1000th volunteer, since it's founding in 1860 by Mary Tealby. REUTERS/Alastair Grant/pool (BRITAIN - Tags: ANIMALS POLITICS)

Britain's Prime Minister David Cameron, holds Bertie, a nine-month-old Yorkshire Terrier, during his visit to Battersea Dogs and Cats Home in London August 13, 2013. Cameron visited the home which was started in 1860 by Mary Tealby, to celebrate the announcement of their 1000th volunteer. REUTERS/Alastair Grant/pool (BRITAIN - Tags: ANIMALS POLITICS)

Claire Horton, CEO of Battersea Dogs and Cats Home, carries a tabby cat named Larry to his new home of 10 Downing Street in London February 15, 2011. Downing Street has a new occupant -- a street-smart character with a licence to kill. Larry, a four-year-old tabby, has been brought in to the British Prime Minister's residence to clean up a gang of dirty rats who have been openly parading in front of the TV cameras. REUTERS/Paul Hackett (BRITAIN - Tags: SOCIETY ANIMALS POLITICS)

Kirsty Walker, head of of Battersea Dogs and Cats Home, feeds the new Downing Street cat 'Larry' before he is taken to the residence of Prime Minister David Cameron in London February 15, 2011. Larry is a three to five year old short-haired tabby cat who was brought to the shelter in January after being found living on the streets of London. REUTERS/Carl Court/POOL (BRITAIN - Tags: ANIMALS POLITICS)

A cat called Larry is photographed in Battersea Dogs and Cats Home, before being taken to Downing Street, in London February 15, 2011. The four-year old tabby cat will join Britain Prime Minister David Cameron and his family in 10 Downing Street, after a rat was recently seen running past the building. REUTERS/Carl Court/Pool (BRITAIN - Tags: ANIMALS POLITICS)

Kirsty Walker, head of of Battersea Dogs and Cats Home, holds the new Downing Street cat 'Larry' before he is taken to the residence of Prime Minister David Cameron in London February 15, 2011. Larry is a three to five year old short-haired tabby cat who was brought to the shelter in January after being found living on the streets of London. REUTERS/Carl Court/POOL (BRITAIN - Tags: ANIMALS POLITICS)

A cat called Larry is photographed in Battersea Dogs and Cats Home, before being taken to Downing Street, in London February 15, 2011. The four-year old tabby cat will join Britain Prime Minister David Cameron and his family in 10 Downing Street, after a rat was recently seen running past the building. REUTERS/Carl Court/Pool (BRITAIN - Tags: ANIMALS POLITICS)

Claire Horton, CEO of Battersea Dogs and Cats Home in London, holds the new Downing Street cat 'Larry' before he is taken to the residence of Prime Minister David Cameron in London February 15, 2011. Larry is a three to five year old short-haired tabby cat who was brought to the shelter in January after being found living on the streets of London. REUTERS/Carl Court/POOL (BRITAIN - Tags: ANIMALS POLITICS IMAGES OF THE DAY)

A cat called Larry is photographed in Battersea Dogs and Cats Home, before being taken to Downing Street, in London February 15, 2011. The four-year old tabby cat will join Britain Prime Minister David Cameron and his family in 10 Downing Street, after a rat was recently seen running past the building. REUTERS/Carl Court/Pool (BRITAIN - Tags: ANIMALS POLITICS)

Claire Horton, CEO of Battersea Dogs and Cats Home in London, holds the new Downing Street cat 'Larry' before he is taken to the residence of Prime Minister David Cameron in London February 15, 2011. Larry is a three to five year old short-haired tabby cat who was brought to the shelter in January after being found living on the streets of London. REUTERS/Carl Court/POOL (BRITAIN - Tags: ANIMALS POLITICS)

A cat called Larry is photographed in Battersea Dogs and Cats Home, before being taken to Downing Street, in London February 15, 2011. The four-year old tabby cat will join Britain Prime Minister David Cameron and his family in 10 Downing Street, after a rat was recently seen running past the building. REUTERS/Carl Court/Pool (BRITAIN - Tags: ANIMALS POLITICS)

A cat called Larry is photographed in Battersea Dogs and Cats Home, before being taken to Downing Street, in London February 15, 2011. The four-year old tabby cat will join Britain Prime Minister David Cameron and his family in 10 Downing Street, after a rat was recently seen running past the building. REUTERS/Carl Court/Pool (BRITAIN - Tags: ANIMALS POLITICS)

Shandy, a staffordshire bull terrier cross, poses on the red carpet with other dogs attending the Battersea Dogs and Cats Home's 150th year "Collars and Coats Gala Ball" at Battersea Power Station in London November 25, 2010. REUTERS/Luke MacGregor (BRITAIN - Tags: ANIMALS SOCIETY)

Woody, a spitz, poses on the red carpet at the Battersea Dogs and Cats Home's 150th year "Collars and Coats Gala Ball" at Battersea Power Station in London November 25, 2010. REUTERS/Luke MacGregor (BRITAIN - Tags: ANIMALS SOCIETY)

Actress Amanda Holden reacts in the cold as she poses at the Battersea Dogs and Cats Home's 150th year "Collars and Coats Gala Ball" at Battersea Power Station in London November 25, 2010. REUTERS/Luke MacGregor (REUTERS - Tags: ENTERTAINMENT ANIMALS SOCIETY)

Actress Amanda Holden poses on the red carpet with a dog attending the Battersea Dogs and Cats Home's 150th year "Collars and Coats Gala Ball" at Battersea Power Station in London, November 25, 2010. REUTERS/Luke MacGregor (BRITAIN - Tags: ENTERTAINMENT ANIMALS SOCIETY)

Actress Amanda Holden poses on the red carpet with a dog attending the Battersea Dogs and Cats Home's 150th year "Collars and Coats Gala Ball" at Battersea Power Station in London, November 25, 2010. REUTERS/Luke MacGregor (BRITAIN - Tags: ENTERTAINMENT ANIMALS SOCIETY)

Winter, a Staffordshire bull terrier cross, poses on the red carpet with other dogs attending the Battersea Dogs and Cats Home's 150th year "Collars and Coats Gala Ball" at Battersea Power Station in London November 25, 2010. REUTERS/Luke MacGregor (BRITAIN - Tags: ANIMALS SOCIETY)

Nila, a german shepherd cross, poses on the red carpet with other dogs attending the Battersea Dogs and Cats Home's 150th year "Collars and Coats Gala Ball" at Battersea Power Station in London November 25, 2010. REUTERS/Luke MacGregor (BRITAIN - Tags: ANIMALS SOCIETY)

Kittens are presented in a bucket to Britain's Camilla, Duchess of Cornwall, during her visit to open the new cattery at the 150 year old Battersea Dogs and Cats Home in London October 27, 2010. REUTERS/Chris Jackson/pool (BRITAIN - Tags: ANIMALS SOCIETY ROYALS)

Kittens are presented in a bucket to Britain's Camilla, Duchess of Cornwall, during her visit to open the new cattery at the 150 year old Battersea Dogs and Cats Home in London October 27, 2010. REUTERS/Chris Jackson/pool (BRITAIN - Tags: ANIMALS SOCIETY ROYALS)

Britain's Camilla, Duchess of Cornwall, holds a kitten named Lucy during her visit to open the new cattery at the 150 year old Battersea Dogs and Cats Home in London October 27, 2010. REUTERS/Chris Jackson/pool (BRITAIN - Tags: ANIMALS SOCIETY ROYALS)