Bobi, the world's oldest dog, turns 31 today.

Bobi, a Portuguese pooch who was declared the world’s oldest dog by Guinness World Records in February, celebrated his 31st birthday on Thursday. His family planned a Saturday birthday party at his home in Conqueiros, a rural village in southern Portugal. His owner, Leonel Costa, told Guinness that Bobi has been enjoying a lot of attention since being crowned the world’s oldest dog. Bobi is a purebred Rafeiro do Alentejo, a breed of Portuguese dog trained to guard livestock. As he gets older, he has had difficulties walking and experienced a decline in his eyesight. Costa attributed his dog’s longevity in part to the “calm, peaceful environment” where he lives. Bobi is also the oldest dog ever recorded, according to Guinness. Costa was just 8 years old when his canine companion was born.