The headline should tell you everything you need to know, but in case you want details, Volkodav dressed his dog up as Amaterasu (the main character of Okami) for Otakon 2011. The puppy, named Dante, is a one and a half year old Samoyed, in case you want to go get your own Amaterasu puppy.
There have been some really great cosplay costumes over the years but this might just take the cake for me. For more views of the costume, check out Volkodav's deviant art page. I think Dale's corgis may have competition in the cute puppy department.