According to a report by CNN Portugal, Guinness concluded that "the necessary evidence no longer exists" that gave the title to the Portuguese dog, which died in October last year, allegedly aged 31 years and 165 days.

The investigation was triggered after complaints from some veterinarians about the age of Rafeiro Alentejano, who lived his entire life in a village in Leiria. According to Guinness, the information contained in the Portuguese database (chip) had been essential to determine the age, however, it did not require proof of age for dogs born before 2008. In other words, "without any conclusive proof", it becomes impossible to maintain the title.

"We take enormous pride in ensuring to the best of our ability the accuracy and integrity of all our titles. Following concerns raised by veterinarians and other experts, both privately and in public comments, and the conclusions of investigations conducted by some media, we considered it important to begin an analysis of Bobi's record. Naturally, we require proof for all Guinness World Records titles", they state.

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