Bluey (7 June 1910 – 14 November 1939) was a female Australian Cattle Dog owned by Les and Rosalie Hall of Rochester, Victoria.

[2] Additionally, Bluey's title was also challenged by many other dogs including Max, Chilla, Maggie, and Bella, though they were never verified.

[3] According to Guinness World Records, Bluey was the oldest-lived dog ever verified, having lived 29 years and 5 months (1910–1939) before being euthanised.

[citation needed] Bluey's age, along with that of "Chilla", a Labrador Retriever and Australian Cattle Dog mix reported to have lived to the age of 32 years and 12 days (but not certified by Guinness),[8] prompted a study of the longevity of the Australian Cattle Dog to examine if the breed might have exceptional longevity.

[10] The study concluded that while Australian Cattle Dogs do live almost a year longer than most dogs of other breeds in the same weight class on average, the cases of both Bluey and Chilla should be regarded as uncharacteristic exceptions rather than as indicators of typical longevity across this entire breed.