The Obama family's dogs, Sunny (R) and Bo (L), on the South Lawn of the White House on August 19, 2013.
- [Pete Souza/White House/Getty Images]
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US President Barack Obama runs down a White House corridor with Bo, then six months old, on April 13, 2009.
- [Pete Souza/The White House/Getty Images]
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German Chancellor Angela Merkel warily eyes Russian President Vladimir Putin's dog Koni at a meeting with journalists in Sochi, Russia, on Jan. 21, 2007.
- [DMITRY ASTAKHOV/AFP/Getty Images]
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Italian Prime Minister Silvio Berlusconi (L) also got to meet Koni at a meeting with Putin at the Novo-Ogarevo residence outside Moscow on Nov. 2, 2004.
- [ALEXANDER NEMENOV/AFP/Getty Images]
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Canadian Prime Minister Stephen Harper has breakfast with his cat, Stanley, in Jan. 2013.
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A policeman attempts to convince Larry, the Downing Street cat, to go inside the British prime minister's residence on June 9, 2011.
- [CARL COURT/AFP/Getty Images]
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US President Bill Clinton's cat Socks was a media darling before he even moved into the White House. In this Nov. 1992 photo, photographers mobbed Socks outside the governor's mansion in Little Rock, Ark.
- [Mike Nelson/AFP/Getty Images]
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US President Bill Clinton often traveled with his dog Buddy, seen here at Andrews Air Force Base in Maryland on May 25, 1999.
- [STEPHEN JAFFE/AFP/Getty Images]
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In this photograph by South African apartheid photographer Alf Kumalo that was widely circulated when South African President Jacob Zuma called owning a dog 'un-African,' a young Nelson Mandela poses with his Rhodesian Ridgeback.
- [Alf Kumalo/Courtesy]
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Britain's Queen Elizabeth II at her office with her dog Susan on Jan. 31, 1959.
- [/AFP/Getty Images]