Dog

Dogs are domesticated subspecies of the wolf. They are used in both the Wizarding and the Muggle worlds as pets or guardians. While normal dogs are considered harmless, some dogs like the three-headed dog Fluffy are highly dangerous.

Dogs in the Wizarding World
In the Wizarding world, dogs serve usually as guardians of certain objects such as the Philosopher's Stone, or merely as pets. When the object the dog is supposed to guard is destroyed or stolen, the dog is set free in the woods such as the Forbidden Forest.

Dogs in the Muggle world
In the Muggle world, dogs are used as pets or animal companions.

Spells that affect dogs
There arent any known spells that can affect dogs in the Wizarding world, but it is known that dogs fall asleep when they hear the music of a harp.

Appearances

 * Harry Potter and the Philosopher's Stone
 * Harry Potter and the Philosopher's Stone (film)
 * Harry Potter and the Philosopher's Stone (video game)
 * Harry Potter and the Chamber of Secrets
 * Harry Potter and the Chamber of Secrets (film)
 * Harry Potter and the Prisoner of Azkaban
 * Harry Potter and the Prisoner of Azkaban (film)
 * Harry Potter and the Prisoner of Azkaban (video game)
 * Harry Potter and the Order of the Phoenix
 * Harry Potter and the Order of the Phoenix (film)
 * Harry Potter and the Half-Blood Prince
 * Harry Potter and the Deathly hallows