He's based on SMS's childhood companion, Bruno, who was a Labrador/Great Dane cross.
I whittled him from limewood then applied a coat of sanding sealer. The lips, pupils, nose and claws were charred with a piece of steel wire that I heated until red hot in a gas flame. The branch in his mouth was pruned from my bonsai Chinese Elm tree. He isn't anatomically correct. ;)
Here he is being sniffed by Pippin (one of my mum's Yorkies).