But dogs are different. The larger the dog, the shorter their life expectancy. A large dog like a Saint Bernard will have a lifespan of between five to eight years, while smaller breeds can generally live as long as 12 to 15 years.
Why do small dogs age slower?
This is true despite the fact that small dogs reach adulthood faster than big dogs. “Small dogs reach skeletal and reproductive maturity sooner than larger breeds. … What this means is that small dogs age more quickly than big dogs in their first couple of human years but slower than big dogs once they hit adulthood.
Why do dogs only live 15 years?
Lifespan in general is determined by trade-offs between survival and reproduction. Wolves, the ancestors of dogs, can live 15-20 years, roughly twice as long as comparable-sized dogs. … So the whole life history of dogs is shifted to more of a “live fast, die young” style compared to wolves.
Which dog has the shortest lifespan?
Top 10 Dog Breeds With The Shortest Lifespan
- Saint Bernard: 8-10 years.
- Newfoundland: 8-10 years.
- Bullmastiff: 7-8 years.
- Great Dane: 7-8 years.
- Greater Swiss Mountain Dog: 6-8 years.
- Mastiff: 6-8 years.
- Irish Wolfhound: 6-7 years.
- Bernese Mountain Dog: 5-7 years.
Can we make dogs live longer?
Improvements to pet food have helped extend dogs’ lifespans, so speak to your vet about the best food for your breed. If you keep your dog healthy with regular walks and visits to the vet it can help give them a long, happy life. … As your pet gets older your excess is likely to increase, too.