Professional dog walker Nobuaki Moribe leads his clients' pets across an intersection in Tokyo on Friday, May 28, 2021. (Photo by Hiro Komae/AP Photo)

A dog walks past a mural by street artist Alex Martinez outside a shop which sells bags at Psiri area, central Athens, on Thursday, January 25, 2018. (Photo by Petros Giannakouris/AP Photo)

Motorcycle enthusiast Gilbert Delos Reyes rides with his pet dog Bogie, in Kawit, Cavite, Philippines, November 26, 2020. (Photo by Eloisa Lopez/Reuters)

A dog dressed up for a show sits backstage during the 16th annual New York Pet Fashion Show on February 7, 2019 in New York City. (Photo by Johannes Eisele/AFP Photo)

Dogs perform during “Stars and starlets”, a new programme, at the National Circus in the Ukrainian capital of Kiev April 30, 2015. (Photo by Gleb Garanich/Reuters)

Sunday night, Lauren Watts searches for her dog in Mayflower, Arkansas., after a tornado struck the town. (Photo by Benjamin Krain/The Arkansas Democrat-Gazette)

German flying ace Baron Manfred von Richthofen (1892–1918) also known as The Red Baron with his dog Moritz, circa 1916.

A dog sits in a plastic tub filled with water in Taipei, Taiwan, 28 July 2020. Betel nut seller Mr Luo, the dog's owner, said he puts his dog, a 12-year-old mixed breed called Ah Dai (Stupid), in a plastic tub filled with water whenever the weather gets hot. Ah Dai enjoys the bath and can sit in the basin for hours, according to Mr Luo. Luo has a dozen pairs of glasses for Ah Dai, so the dog wears different glasses every day and many tourists take photos of Ah Dai. (Photo by David Chang/EPA/EFE)