Bluey, Australian cattle dog, second-oldest recorded dog (died 1939)

Bluey was a female Australian Cattle Dog owned by Les and Rosalie Hall of Rochester, Victoria. She holds the Guinness World Record as the oldest verified dog to have ever lived. The record was briefly disputed by Bobi, but Bobi's certification was revoked by Guinness due to the lacking evidence, after veterinarians came forward challenging Bobi's claimed age. Additionally, Bluey's title was also challenged by many other dogs including Max, Chilla, Maggie, and Bella, though they were never verified.

The Australian Cattle Dog, or simply Cattle Dog, is a breed of herding dog developed in Australia for droving cattle over long distances across rough terrain. This breed is a medium-sized, short-coated dog that occurs in two main colour forms. It has either red or black hair distributed fairly evenly through a white coat, which gives the appearance of a "red" or "blue" dog.

This is a list of the oldest verified dogs in the world, listed by age, all of whom have attained the minimum age of 20. Aging in dogs depends on many factors, including breed, size and diet.

June 7 is the 158th day of the year in the Gregorian calendar; 207 days remain until the end of the year.