This prank video, courtesy of animal welfare group PETA, tries to show that drinking milk from any animal is ‘nasty’. Humans are the only species on the planet that drinks another animals milk, and cow’s milk is no more natural for us than dog’s milk, says PETA director Elisa Allen. PETA teamed up with top London creative agency Dont Panic for the new campaign, which used soya milk - not dogs milk - in its production.