Lifespan by size
| Size | Typical lifespan | Examples |
|---|---|---|
| Small | 13 to 16 years | Jack Russell, Chihuahua, Toy Poodle |
| Medium | 11 to 14 years | Border Collie, Springer Spaniel, Beagle |
| Large | 10 to 12 years | Labrador, Golden Retriever, German Shepherd |
| Giant | 7 to 10 years | Great Dane, Bernese Mountain Dog, Irish Wolfhound |
A 2024 UK study of over 580,000 dogs (McMillan et al., Scientific Reports) found a median of about 12.5 years overall, with flat-faced medium breeds such as the French Bulldog among the shortest-lived.
Why big dogs age faster
Large breeds grow very quickly and seem to age faster, with earlier arthritis, heart disease and cancers. That's why the dog years calculator adjusts for size.
What actually helps
- Staying lean. In a long-running Labrador study (Kealy et al., 2002), dogs fed 25% less lived a median of about 1.8 years longer.
- Regular exercise suited to age and breed
- Dental care and yearly check-ups, then every six months for seniors
- Vaccines, parasite control and neutering decisions made with your vet
- Choosing a breeder who health-tests parents
Check that portions match your dog's needs with the dog food calculator.
Frequently asked questions
What dog breed lives the longest?
Small breeds such as the Lancashire Heeler, Tibetan Spaniel, Miniature Dachshund and Jack Russell are often near the top in lifespan studies.
At what age is a dog a senior?
Roughly the last quarter of expected lifespan: around 10 for small dogs, 8 for large and 6 to 7 for giants.