" Harry, Ron, and Hermione had always known that Hagrid had an unfortunate liking for large and monstrous creatures. During their first year at Hogwarts he had tried to raise a dragon in his little wooden house, and it would be a long time before they forgot the giant, three-headed dog he’d christened “Fluffy. "

― J.K. Rowling , Harry Potter and the Chamber of Secrets (Harry Potter, #2)