Leonel Costa, owner of Bobi, the world's oldest dog, announced his passing on Saturday at the age of 31. Bobi had held the Guinness World Record since February, attributed to a combination of good food, fresh air, and lots of love. His breed, Rafeiro do Alentejo, has an average life expectancy of 12 to 14 years, and Bobi's diet of human food had contributed to his long life.