Hamsters, the German hamstern "make reservations" - are small rodents…
This feature is not unique to humans and instead occurs more frequently in some animals such as cats and dogs.
Although found on humans, the complete heterochromia is more common in other species (in most cases with one blue eye, or white). This anomaly occurs very frequently in Japanese bobtail cat breeds, Turkish Angora or Turkish Van. Some dogs, especially heterochromia is seen in the Husky (especially among the crossings – or illegitimate – husky) the iris usually clear, and the Alaskan Malamute usually dark iris. Mini Aussie (Australian Shepherd mini) is also frequently involved.
It is also found in horses, especially in the paint-horse.