"I s'pose if you're from earlier you don't know what your nickname was in our letters," Harry said, smiling a small smile at Sirius, as he got up and scritched him on the head. "It was Snuffles--and before you say anything, you thought it up, not me."

It always felt odd to deal with Sirius in his animagus form knowing he was a person, and yet...it didn't. The doggy personality suited him perfectly at times and it made showing affection easier and free-er, less awkward.