Here's a breakdown of the classification:

* Domain: Eukarya (organisms with cells containing a nucleus)

* Kingdom: Animalia (multicellular, heterotrophic organisms)

* Phylum: Chordata (animals with a notochord, dorsal hollow nerve cord, pharyngeal slits, and a post-anal tail at some point in their development)

* Class: Mammalia (animals with mammary glands, hair or fur, and a four-chambered heart)