What do you call a pet rat? - briefly
A domesticated rat kept as a companion is commonly called a “fancy rat” or simply a pet rat. The term distinguishes it from wild or laboratory specimens.
What do you call a pet rat? - in detail
The common term for a domesticated rat kept as a companion animal is “pet rat.” In hobbyist circles the animal is frequently referred to as a “fancy rat,” distinguishing it from wild or laboratory specimens. The scientific designation for the species most often bred as a pet is Rattus norvegicus domestica, a subspecies of the Norway rat.
When describing the animal in informal conversation, owners may use:
- “rat” (context clarifies pet status)
- “fancy rat” (emphasizes selective breeding for appearance)
- “domestic rat” (highlights its adaptation to living with humans)
- “rat companion” (focuses on its role as a pet)
Breed names add specificity, for example “Hooded Fancy,” “Satin,” or “Dumbo” rats, each describing a particular coat pattern or ear shape. Pet‑store listings and veterinary records typically employ the generic term “rat” together with the qualifier “pet” to differentiate from wild or research animals.
In legal documents, the animal may be classified as a “domesticated rodent” or simply listed under the broader category of “small mammals.” The terminology varies by context, but “pet rat” and “fancy rat” remain the most widely recognized labels.