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Mexico, 2018 - Xin Xin, a female giant panda, is having blood drawn at Chapultepec zoo in Mexico City.

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Bolivia, 2018 - Pancho the sloth is recovering from surgery at an animal refuge in Cochabamba after being hit by a vehicle.

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United Kingdom, 1944 - A vet examines a dog patient in the street after bomb damage forced him to close his clinic.

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Canada, 2014 - This false killer whale baby was rescued near the shores of Tofino in bad shape, but received 24-hour care at the Vancouver Marine Mammal Rescue Centre.

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Hungary, 2009 - Liesel, Budapest Zoo's oldest gorilla, about to undergo surgery to remove a tumor in her uterus. She was 32 years old at the time.

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Kosovo, 2014 - This brown bear is one of six adults and three orphaned cubs that were rescued from illegal private zoos all over the country and taken to the Four Paws Bear Sanctuary in Priština.

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Japan, 2013 - Chocolate, a miniature dachshund, looks confused as it receives acupuncture therapy at the Marina Street Okada animal hospital in Tokyo.

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England, 2012 - An X-ray shows the leg of Juba, a cheetah cub, who was operated at Chester Zoo to mend a fracture in his right ankle.

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England, 2012 - Then nine months old, Juba is seen here before the operation to insert a metal plate in his fractured ankle.

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India, 2014 - Ayyappan the elephant receives glucose after being rescued from a marshland on the banks of the Vembanad Lake.

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United States, ca. 1950 - A mobile vet bandages the injured leg of a dog in New York, while the young owner anxiously watches.

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Australia, 2012 - Bo, a 55-day-old baby echidna (or a puggle), rests in the hands of a vet nurse at Taronga Zoo in Sydney.

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Brazil, 2011 - A veterinary physiotherapist turned her São Paulo home into a hospital to care for three-year-old Ariel in an effort to cure a rare autoimmune disease that paralyzed the animal's legs.

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England, 2011 -

This female slender loris, then five months, sleeps as she is given her first health check at the London Zoo.

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Chile, 2014 - This injured green sea turtle was treated at the University of Concepción after being found by fishermen. 

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Israel, 2014 - The Syrian brown bear Mango, then 19 years old, underwent an unprecedented surgery at the Ramat Gan Safari to repair a herniated vertebra.

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Argentina, 2014 - The jaguar Tango, then 11 years old, had his DNA entered into the country's DNA bank, an effort that could help save this vulnerable species.

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Chile, 2013 - An Andean condor, one of the world's biggest flying birds, receives treatment after at least 20 individuals were found poisoned next to a road in Los Andes.

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United Kingdom, 1971 - A PDSA vet tends to an injured swan.

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El Salvador, 2012 - A veterinarian examines two dolphins, a female and a male, that were found beached and injured in two different spots along the coastline.

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India, 2011 - This monkey is still out from the anesthesia administered before its sterilization procedure in Shimla.

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Unknown, 1946 - A cow receives a health check from a visiting veterinarian using a converted mine detector.

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Brazil, 2012 - The lioness Fafá, then 17 years old, receives a CT scan in Brasilia to help pinpoint the cause of her seizures and bleeding.

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United States, 2013 - Chris P. Bacon, the piglet, was born with a condition in his hind legs that prevented him from walking, but veterinarian Len Lucero (pictured) fashioned a wheelchair out of K'Nex toys to help him walk.

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Thailand, 2015 - A two-year-old orangutan receives a health examination at Kao Pratubchang Conservation Centre in Ratchaburi.

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Romania, 2013 - This rescued stray is being sterilized at a shelter near Bucharest so he can be ready for adoption.

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Unknown, ca. 1950 - This doggo would soon start to feel better after his leg was fixed.

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Brazil, 2013 - This boa constrictor receives vaccination at the Castanheiras Pied Tamarin Wildlife Refuge in Manaus.

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England, 1957 - A dog receives treatment in a mobile clinic run by the Blue Cross in London.

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Malaysia, 2012 - Puntung, a Sumatran rhinoceros, is being examined by a veterinarian in Lahad Datu.

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Chile, 2014 - This baby kodkod, the smallest species of wildcat in the Americas, was found abandoned in the woods near Concepción.

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England, 1970 - A six-month-old female camel drinks from a bottle as her mother was denying her milk at the London Zoo.

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France, 2013 - This black-and-white ruffed lemur is being cared for at the family-owned Palmyre Zoo in Les Mathes.

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France, 2017 - This doggo looks peaceful as he undergoes surgery in Nice.

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Australia, 2008 - An injured koala receives treatment at Queensland's Australian Wildlife Hospital, which was built as a living memorial to famed conservationist Steve Irwin.

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Germany, 2013 - This cat is getting ready for surgery to mend a broken leg in Berlin.

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Unknown, 1977 - Two veterinarians treat a dog with a kidney machine.

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Israel, 2005 - This lioness is being readied for a CT scan, which will help determine whether she suffers from vitamin A deficiency.

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Unknown, 1956 - A vet examines an iguana.

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United Kingdom, 1965 - A vet uses crown forceps to extract a tooth from a horse.

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England, 2011 - An Irish Sport Horse is hoisted onto an equine operating table at Newmarket Equine Hospital.

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England, 1913 - An English sheepdog is examined by a vet in London.

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England, 2011 - Vets check a Warmblood horse after mouth surgery at Newmarket Equine Hospital.

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Spain, 2017 - An orphaned baby duck is weighed upon its arrival at the GREFA hospital in Majadahonda.

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United States, ca. 1960 - A poodle, fitted with a bathrobe, pays a visit to a drug store for dogs in New York City.

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Colombia, 2010 - Reyna, a rescued female jaguar, receives dental treatment at a veterinary clinic in Envigado, near Medellín.

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United States, 2010 - A brown pelican covered in oil is cared for by veterinarians of Louisiana's Fort Jackson Wildlife Rehabilitation following the Deepwater Horizon oil spill.

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England, 2011 - An eight-month-old female slender loris anxiously awaits her first health check by the veterinary team at the London Zoo.

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England, 2011 - Following her health check, the baby slender loris soundly falls sleeps in the hands of a vet.

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Germany, 2013 - A couple comfort their shepherd-terrier mix as it receives a new bandage on its leg at a clinic in Berlin.

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England, 1942 - Animal welfare pioneer and PDSA founder Maria Dickin caresses a wirehaired terrier named Pat, one of the 92,000 dogs rescued during the Blitz.

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Germany, 2013 - A horse undergoes surgery on a fractured leg while a technician monitors its status at a clinic in Berlin.

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United States, 1932 - Pete, Hal Roach's pup from 'Our Gang,' has his teeth cleaned, throat sprayed, eyebrows plucked, toenails polished, and ears cleaned by a vet.

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China, 2007 - A stray cat is readied for sterilization surgery in Beijing, in an effort to reduce Nanlang's stray cat population.

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England, 2011 - A thoroughbred is readied for an operation at Newmarket Equine Hospital.

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England, 2012 - Dylan the chimpanzee undergoes a cardio ultrasound examination at Chester Zoo in Liverpool.

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Hungary, 2018 - Igor, a 13-year-old Siberian tiger, is still out from the non-invasive stem cell surgery he underwent at Szeged Zoo.

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Brazil, 2015 - A toucan with a fractured leg receives electroacupuncture treatment at the veterinary hospital in Brasilia's zoo.

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Peru, 2016 - A white Bengal tiger cub receives a check-up by vets of Huachipa's private zoo in Lima.

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England, 1928 - A vet examines a handsome dog in London. 

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