Pooch crowned oldest doggy Play video The world's oldest dog has reached 147 in dog years and earned a Guinness certificate, with a big bash and a cake. Chanel, a dachshund from New York, was treated to a day out at the city's Dog Hotel and Spa to mark the milestone birthday and collect a certificate from a Guinness World Records official confirming their pet's status as the oldest dog. Chanel is not quite as sprightly as a human 21-year-old - she has cataracts, suffers from the cold and her hair has turned completely white. She needs to wear doggy glasses to protect her eyes and, despite running miles in her younger days, now only takes short walks in warm weather. It is no wonder she is getting a bit frail, her estimated age in dog years - based on the canine ageing process - is 147. The previous holder of the title was Butch, a 28-year-old dog from America which died in 2003, and last year Bella, a Labrador cross from Derbyshire died at the age of 29 although she never officially held the record because her owners had no proof of her age.