A chimpanzee bottle-feeds a lamb at Southam Zoo Farm in Warwickshire. The owners of the zoo, Mr and Mrs Clews, bring up many of the animals as their pets; the animals, are, as a result, of a friendly disposition. (Photo by Fox Photos/Getty Images). 23rd August 1968

Film actress Audrey Hepburn (1929–1993) on a film set with her pet poodle, circa 1960. (Photo by Hulton Archive/Getty Images)

Magira, the cat, stands in a new pet cleaning machine known as the PetSpa June 21, 2002 in Miami, Florida. The side-loading washing machine features 37 spray nozzles and is capable of washing, rinsing and blow drying a dog or cat in 30 minutes. (Photo by Joe Raedle/Getty Images)

Most pet cats will become timid or defensive when outdoors, but not Millie – after being adopted by her mountain-climbing owner Craig Armstrong, Millie has become a feline hiking and mountain-climbing legend.

Evelyn Ramirez and Juan Manuel enjoy posting adorable photos of their pit bull on Instagram. However, their photos seem to be gaining traction online, thanks to their pet’s dapper get-ups.

In collaboration with Pet Stylist Ruben Santana, Sophie Gamand has photographed dogs as they are being washed before grooming. The way the water plays with their hair, and their facial expressions as the water is poured on them creates striking portraits that resemble famous humans or important characters.

Three pugs peer out from a car window in Los Angeles, California. A wacky photographer has come up with an unusual pet project – snapping ecstatic dogs as they hang their heads out of car windows. Lara Jo Regan, 48, embarked on the odd task for her new 2014 calendar “Dogs In Cars”. The unusual shoot, which took place in Los Angeles, California, aimed to explore the joy experienced by pugs and huskies when a breeze hits their faces. (Photo by Lara Jo Regan/Barcroft Media)