Rat Terrier (RT, Rat)

Weighing 10–25 lb (4.5–11.3 kg) and standing 10–18 in (25.4–45.7 cm) tall, the Rat Terrier is a small-sized representative of the Terrier Group. Among AKC-registered breeds it sits at #81 by popularity. Originally from United States, the breed carries that working heritage in its build and temperament. As with most breeds, males occupy the top of the size range.

How long do Rat Terriers live? Based on published breed data, a typical lifespan is 12–18 years. Lifespan is influenced by size, since smaller dogs generally outlive larger ones, alongside genetics, body weight, dental care and regular veterinary checkups. Keeping a Rat Terrier lean, exercised and current on preventive care is the most practical way to reach the upper end of that range. Against the average dog, small-sized breeds like this one sit on the longer-lived end of the spectrum.

Compact living rarely stresses this breed, provided daily walks happen on schedule. A moderate shedder — weekly brushing keeps loose hair under control. Low-maintenance coat: a quick weekly brush and the occasional bath cover it. No low-shedding claim applies here. Allergy sufferers should spend time with the breed before committing.

This is a high-energy breed that needs serious daily activity to stay happy and well-behaved. Eager to please and quick to learn, this breed makes training one of the genuine joys of ownership. This breed is known as an excellent family dog that generally adores children. Canine housemates generally work out fine, though same-sex pairs can need more management.

Every number on this page is meant to be used, not just read. The calculators below start from this breed's 7.9 kg average weight, which in our 152-breed database sits heavier than 25% of breeds, and turn it into daily food portions, crate sizing and first-year budget estimates. Where a breed sits by weight predicts its cost of living better than fame does. Data comes from the AKC breed profile cited below, and breed-specific health risks are exactly why comparing pet insurance early, while your dog is young and healthy, pays off.