Dog

The Dog lives in the Si Wong Desert and most parts of the Earth Kingdom. While may be used as pets, the one seen in Avatar: The Last Airbender was a stray dog, licking the small iceberg in the desert. This animal was first seen in The library

Anatomy
The dog is one of the few Unhybridized Creatures in the world of Avatar. The dog may have many different breeds and colors, but the one seen had black fur, with a brown underbelly.