Heto, in his dog form, bears basically no relation to his human self, but for over a decade he had often been a mascot or avatar for me in pet games. In this form he's not sentient, he's just a regular dog.
He's an Alaskan Husky, not Siberian, which is to say he's smaller, lighter, and faster: a racing dog, not a purebred.
Heto's a sled dog (lead on his team), a happy fella, a thief and a trickster. He likes fish and making a mess.