If it were up to us, our dogs would stay by our side forever. Reality is tougher, and even the most loved pets have a limited number of years. Still, some breeds are known for reaching old age more often than others, and genetics is only part of the story. Everyday habits, diet, veterinary care, and even a dog’s size can make a meaningful difference.
Size comes up again and again in longevity conversations for a reason. Research comparing lifespans suggests larger dogs tend to die younger, and some scientists believe decades of selective breeding for bigger bodies may have made certain large breeds more vulnerable to cancer. The idea is that dogs were “grown” in size faster than their biology could adapt, leaving less time for natural defenses to keep pace. In other words, the body got bigger, but the protective systems did not necessarily catch up.
Newsweek discussed this topic with veterinarian Dr. Bethany Hsia, who highlighted five breeds that frequently appear near the top of longevity lists. Chihuahuas are famous for their long lifespans, with many living 14 to 16 years and some exceeding that. Dachshunds, especially miniature types, often reach 12 to 16 years and can go beyond, but their long backs mean weight control is crucial to reduce strain and the risk of spinal trouble.
Toy and miniature poodles also have a reputation for both brains and staying power, commonly living 12 to 16 years when well cared for. Shih Tzus, beloved for their affectionate, people focused nature, often live anywhere from 10 to 16 years, with breathing health and consistent grooming playing a big role in how comfortably they age. Beagles are larger than the other dogs on this list, yet they still often live 12 to 15 years, helped by their active temperament as long as their enthusiastic appetite is kept in check.
Dr. Hsia emphasizes that breed matters, but it is not destiny. A high quality, balanced diet tailored to age, size, and activity level supports long term health, and keeping treats and table scraps modest helps prevent obesity, which can shorten life and worsen chronic issues. Daily movement matters, too, since regular exercise supports the heart, muscles, and joints while also reducing boredom related behavior problems.
A longer life is not only about the body, it is also about the mind and environment. Training sessions, puzzle toys, sniff heavy walks, and new experiences can keep dogs mentally engaged and may slow cognitive aging. Preventive vet visits, vaccinations, and parasite protection help catch issues early, when they are easier to manage. And a calm home with fresh water, a warm place to sleep, and protection from harsh weather can support overall wellbeing year round.
Which breeds have you seen thrive into old age, and what routines have helped your dog stay healthy as the years add up? Share your thoughts in the comments.
