What is the breed called for a large rat? - briefly
«Giant rat» is the common designation for a large‑sized Rattus norvegicus. It is also referred to as the Norwegian or brown rat when describing the species.
What is the breed called for a large rat? - in detail
The term most commonly applied to a rat of exceptional size is «Giant». In the fancy‑rat community this designation refers to a breed that has been selectively bred for increased body mass and length. Typical adult males reach 300–500 g, while females attain slightly less. Growth is achieved through successive generations of the largest individuals, often labeled as “F1” (first‑generation) or “F2” (second‑generation) giants.
Key characteristics of the »Giant« breed include:
- Size: Body length up to 30 cm, tail length proportionally longer; overall weight exceeds that of standard fancy rats by 50–150 %.
- Coat varieties: Available in standard smooth, Rex (curly), and Hairless forms; each retains the giant phenotype while differing in fur texture.
- Temperament: Generally calm and docile, reflecting the selective emphasis on manageable behavior alongside size.
- Health considerations: Higher susceptibility to joint stress and metabolic disorders; regular veterinary monitoring recommended.
Breeding practices emphasize:
- Selecting the heaviest, healthiest specimens from each litter.
- Pairing individuals with complementary genetic backgrounds to avoid inbreeding depression.
- Providing a diet enriched with protein and calcium to support rapid growth without compromising skeletal integrity.
Owners of »Giant« rats should ensure spacious cages, reinforced flooring, and enrichment items sturdy enough to accommodate larger bodies. Environmental temperature should be maintained between 18 °C and 24 °C to prevent heat stress, which larger rodents experience more intensely.
In summary, the recognized breed name for a rat of considerable size is «Giant», encompassing multiple coat types and requiring specific husbandry measures to promote welfare and longevity.