One Piece Chapter 12, page 12: Chapter 12: DOG

No, he's not... He got sick and passed on.' Luffy looks surprised. Boodle continues, 'He went to the hospital three months ago.' A flashback shows the owner, an older man with a mustache and a dark knit cap, leaving for the hospital, waving back and saying, 'Awright, Chouchou... You're in charge of the shop while I'm in the hospital.' Chouchou barks, 'Ruff!' in response. Nami, deeply moved, says, 'The poor thing... You mean he's been waiting for his master this whole time?' Boodle replies, 'That's what everybody says, but that's not what I think.