Big Bang's Taeyang lost his most treasured companion in the world on June 10 -- his dog, Boss.According to a report on allkpop.com, Taeyang had been asking fans a over the world to pray for Boss, who was undergoing surgery for a herniated disc.Despite efforts to save its life, Boss didn't make it however. Taeyang said his farewells on Twitter, saying "Farewell, Boss.. You brought me lots of fun and joy for the past 5 years.. Thank you and also, hyung is sorry", and "I thank all of the doctors at the Cheongdamdong clinic who worke hard for Bos durin that time. Especially, director Lee Jae Yong who took good care of him.. I won't forget it!!"Many of his fans who have felt the pain of losing a beloved pet reached out to him with words of sympathy.