I wrote a story like this a very long time ago, but it's time that it was formally added to the Oddiverse:
Doctor Odd looked at the destruction in the yard, sighed, and kneeled down to talk to his daughter. "Pumpkin," he said. "Remember when Daddy taught you about grafting?" Pumpkin nodded her head. "Well, there's a good kind of grafting and a bad kind. Good grafting is when you combine plant varieties to make bug-resistant species or crops that survive droughts." Pumpkin smiled. "Bad grafting is what you did with your friend Bobby, the lawnmower, and your dog." Pumpkin frowned. "Daddy will clean up this mess. Now go wash up for dinner." Pumpkin ran inside and squealed happily for tater tots.