Oldest Dog in the World: Bluey and the Guinness Record

The longest-lived dog in the world died in 1939. If you have never heard of him, you are not alone: for decades the name that circulated in conversations about canine records was another, more recent and easier to remember. But that other title fell.

In February 2024, Guinness canceled a longevity record that seemed settled, and the top spot went back to a dog that had already been dead for 85 years. The story explains something that holds for any record: a number without proof is not a record, it is a claim.

Bluey: the record that was never beaten

Bluey was an Australian Cattle Dog born in 1910, in Australia. He lived until 1939 — 29 years and 5 months. It is the longest lifespan ever documented in a dog, recorded at the time and never surpassed by a case with valid proof.

To put it in perspective: according to the American Kennel Club, a medium-sized dog lives on average 10 to 13 years, and a large dog 10 to 12 — giants, 8 to 10. Bluey more than doubled that expectancy, at a time when veterinary documentation was rare and informal. His record held for almost a century.

Bobi: the record that fell, not one that was beaten

For a while, the title changed hands. Bobi, a Portuguese dog, was said to have been born on May 11, 1992 and died on October 21, 2023 — thirty-one years and one hundred sixty-three days, almost two years more than Bluey.

In February 2024, Guinness canceled that record. The reason was not finding an older dog: it was the lack of proof of Bobi's date of birth. Before 2008 the organization did not require proof of age for any dog, and Bobi's case fell right into that gap of documentation predating the requirement.

Without proof, the record doesn't hold — even if the claimed number was larger. The title went back to Bluey.

Star Title: the other canine record that still stands

While the longevity record changed hands and came back, the canine speed record never moved. It belongs to Star Title, a Greyhound — a breed the American Kennel Club describes as the fastest of all dog breeds.

Star Title clocked 67.3 km/h (41.8 mph) on March 5, 1994, in Wyong, Australia. More than thirty years later, the record still stands.

The canine records mentioned, summarized

Dog	Breed	Mark reached	When	Status of the record today
Bluey	Australian Cattle Dog	29 years and 5 months of life	1910–1939	Current — longest-lived dog with valid proof
Bobi	—	31 years and 163 days claimed	1992–2023	Canceled in February 2024, for lack of proof of date of birth
Star Title	Greyhound	67.3 km/h (41.8 mph)	March 5, 1994	Current — canine speed record

What is the difference between a canceled record and a surpassed record?

It is worth separating the two. A record is surpassed when someone presents a better-documented case than the previous one — longer life, more speed, with equal or superior proof. That is how, in theory, Bobi would have beaten Bluey.

A record is canceled when the basis that supported the number stops withstanding checks. No dog lived longer than the 31 years and 163 days claimed for Bobi. What was missing was a document proving his date of birth — without that, the claim doesn't become a record, however large the number.

This difference matters because it explains why Bluey, dead since 1939, returned to the top in 2024. He didn't need to live longer or be rediscovered. The competitor that had surpassed him on paper lost the title because of a failure of proof, not because of a dispute with another, older dog.

Frequently asked questions

Why was Bobi's record canceled if he really lived to 31?

Guinness doesn't dispute that Bobi lived until 2023. The problem is proof of his date of birth, May 11, 1992. Before 2008 the organization did not require this kind of proof for any dog, and without a document supporting the start of the count, the record doesn't hold — even if the dog existed and lived many years.

Is Bluey still considered the official record holder today?

Yes. After the cancellation of Bobi's record in February 2024, Guinness recognizes Bluey, an Australian Cattle Dog who lived from 1910 to 1939 (29 years and 5 months), as the longest-lived dog ever documented with valid proof.

What is the fastest dog breed in the world?

The Greyhound. It is the breed of Star Title, holder of the canine speed record at 67.3 km/h (41.8 mph), clocked on March 5, 1994. The American Kennel Club describes the Greyhound as the fastest of all recognized breeds.

Can an ordinary dog live close to Bluey's 29 years?

It is extremely rare. The average for medium-sized dogs is 10 to 13 years and for large dogs 10 to 12 (American Kennel Club); even among small breeds, which live longer, the ceiling usually sits around 18 years. Bluey's case is exceptional even within the universe of documented records — which is why it still stands almost a century later.

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