"One of the boys that was friends with the werewolf, he was your father. James." Sirius smiled, showing one of the boys and then showing how he changed into the stag. Of course that would be the one Harry was drawn to. "And then there was me, of course. You already saw me." Still, he had the boy who changed into the puppy appear as well. "Your father's animagus form was a stag. And I'm the giant puppy."

He laughed, and maybe it did sound just a little bit like barking. "When you were little, you liked playing with his antlers."