Lately, Hagrid had been frequenting the Forbidden Forest.
The three-headed dog Fluffy was hidden by Dumbledore in a cave within the Forbidden Forest. Every day, Hagrid brought it food, and he also needed to occasionally take Fluffy out for a walk—this was one of Hagrid's happiest memories.
Fluffy was growing rapidly, and its size was already close to Hagrid's elbow. It would reach full maturity this summer holiday, at which point Dumbledore would have someone send it back to Greece.
Chapter 238