A hamster is a type of small, burrowing rodent that is commonly kept as a pet.
In 1991, one of Queen Elizabeth II's pet corgis was transformed into a hamster by an unknown witch or wizard, prompting the Improper Use of Magic Office to launch an investigation. Muggle authorities concluded that the Queen's dog had been stolen and replaced with a hamster as a "cruel" prank.
- Harry Potter and the Philosopher's Stone (film) (Mentioned in newspaper)
- Harry Potter and the Philosopher's Stone (video game) (GBA version) (Mentioned only)
- Pottermore (Mentioned only)