The Request
Disclaimer: If you think I own anything related to Harry Potter and the Potterverse, your grasp on reality is even worse than mine.
Timeframe: Post-canon. Canon-compliant or not, as you see fit, because it doesn't matter.
Synposis: A very short one-shot. A question is posed, which cannot be easily or readily answered.
Harry was on diaper duty.
He and his new son were in the washroom, dealing with the most recent emissions. Having some extensive experience with his previous children, Harry cast a bubble-head spell around the business end of the infant to prevent the consequences of unscheduled activities, removed the used nappy, scourgified the contents, and tossed the remains into the disposal bin (thanking Whoever for muggle-invented sanitary products).
He heard the door open, and looked up to see his youngest daughter, watching him with big eyes. The girl had just started exhibiting accidental magic, confirming her status as a witch, to the delight of her family.
The little witch had heard about this process but this was the first time she had witnessed it being performed on the infant who had so recently replaced her as the baby of the family.
She asked "Daddy, what are you doing?"
Harry smiled. "I'm changing Jimmy."
Renee's forehead wrinkled up and it was apparent that she was thinking hard. Then she smiled brightly.
"Can you change him into a puppy?"
Harry was about to say no, when he thought of the skills of his father and, in particular, his dogfather. Maybe…..