You were Sirius Black' son and you were only 2 years old but you already had a animagus and you were in your little black dog animagus, just like your father who was a black dog animagus, much bigger than you.

You were just a little pup trying to figure out how to transform back into your normal self. Right now you were padding around in the Forbidden Forest with your little black paws, looking around because you knew your father was there.

Then you saw a black dog that looked like your father's animagus, so you ran to the black dog and the black dog turned around and saw you as you stop in front of him and he growl instantly, ears going up, making your ears go down, afraid, your tail between your back paws.

You could swear it was your father but he didn't seem to recognize you because It's the first time you're in your animagus form and your tail was still between your legs as the black wolf, your father, was narrowing his eyes at you, preparing to attack.