Rat Terrier Lifespan: How Long Do They Live?
Everything you need to know about the Rat Terrier's life expectancy, factors that affect longevity, and tips to help your dog live a longer, healthier life.
Average Lifespan
12–18 years
Size Category
Small
Compared to Average
Above average
Rat Terrier Life Expectancy
Living 12–18 years on average, the Rat Terrier's lifespan is above average for its size. Exceptionally long-lived for a dog, averaging 15 to 18 years, with many individuals remaining active and healthy well into their late teens..
Key longevity factors include genetics (choose health-tested parents), nutrition (feed a balanced diet), regular exercise, and consistent veterinary care. Weight management alone can add years to a Rat Terrier's life.
Lifespan Range Visualization
Lifespan by Gender
| Male | 12–18 years |
| Female | 12.5–18.5 years |
Factors That Affect Rat Terrier Lifespan
Several factors influence Rat Terrier longevity (average 12–18 years):
- Genetic heritage: Choose a breeder who tests for Patellar Luxation and performs all recommended clearances
- Diet quality: Feed a complete, balanced diet (0.5–0.5 cups/day) and avoid overfeeding
- Physical fitness: 70+ minutes daily maintains joint, heart, and metabolic health
- Medical care: Annual visits (biannual after 10), dental cleanings, and early intervention
- Healthy weight: Maintaining 10–25 lbs prevents joint issues and extends lifespan
- Stress reduction: Need 40 to 60 minutes of daily exercise with a mix of walks, running, and interactive play, with their speed making them natural lure coursing competitors.
Tips to Help Your Rat Terrier Live Longer
Your Rat Terrier's longevity starts with daily habits (breed average: 12–18 years):
- Diet: Controlled portions to maintain 10–25 lbs, with attention to fat content given the breed's susceptibility to Patellar Luxation
- Exercise: 70+ minutes daily, tailored to age and ability
- Preventive care: Current vaccinations, parasite control, and routine screenings
- Vet visits: Annual for adults, biannual for dogs over 10
- Dental health: Regular brushing prevents systemic disease
- Mental fitness: Training (trainability 4/5), play, and social interaction
- Vigilance: Don't ignore subtle changes—they may signal treatable conditions
Lifespan Compared to Similar Breeds
| Breed | Lifespan | Size |
|---|---|---|
| Shiba Inu | 13–16 yrs | Small |
| Chihuahua | 14–16 yrs | Small |
| Toy Poodle | 10–18 yrs | Small |
| Cesky Terrier | 12–15 yrs | Small |
| American Hairless Terrier | 14–16 yrs | Small |
Frequently Asked Questions
Average lifespan is 12–18 years. Exceptionally long-lived for a dog, averaging 15 to 18 years, with many individuals remaining active and healthy well into their late teens..
The top factors: weight management (lean dogs live longer), daily exercise, quality nutrition, preventive veterinary care, and dental hygiene. Exceptionally long-lived for a dog, averaging 15 to 18 years, with many individuals remaining active and healthy well into their late teens..
Longevity records for Rat Terriers are not formally tracked, but anecdotal reports suggest some individuals have reached 21–23 years. For a small-sized breed, this is achievable with excellent care. Factors that contribute to exceptional longevity include health-tested parentage, a short, smooth, and dense coat kept in good condition, proper weight management, and early detection of breed-specific conditions like Patellar Luxation.
The Rat Terrier's 12–18 year lifespan does not vary significantly between males and females. Generally one of the healthier terrier breeds with fewer genetic issues, though patellar luxation remains a common orthopedic concern to screen for.. What matters more: genetics (choose health-tested parents), maintaining a lean body weight, providing 70+ minutes of daily exercise suited to their terrier heritage, and screening for Patellar Luxation and Legg-Calve-Perthes Disease.
Spaying/neutering may modestly extend lifespan by eliminating reproductive cancers. For the Rat Terrier, weighing 10–25 lbs at maturity, most vets suggest the procedure around 6–12 months of age. Given the breed's predisposition to Patellar Luxation, discuss timing with your vet to balance reproductive cancer prevention against other health considerations.