Shortest Dog Life Expectancy: 10 Breeds Compared

Every dog's life feels too short. But for some breeds, the average lifespan is noticeably shorter than for others. If you share your home with a giant or flat-faced breed, or you're thinking about getting one, knowing what to expect helps you plan and make the most of the time you have.

Here's which breeds have the shortest life expectancy, why size and face shape make such a difference, and what you can do to support a short-lived breed.

Shortest Dog Life Expectancy — The Short Answer

Giant breeds and some flat-faced breeds have the shortest average lifespans. In a large UK study, the Caucasian Shepherd had the lowest median lifespan at 5.4 years. Breeds like the Dogue de Bordeaux, Irish Wolfhound, and Mastiff are also known for short lives, with AKC life expectancy ranges that start at 5 to 6 years.

For comparison, the median for all dogs in that study was 12.5 years.

What the Research Shows

In 2024, the charity Dogs Trust published one of the biggest studies of dog lifespans to date, with input from Liverpool John Moores University. According to the LJMU summary, the team analyzed data on 584,734 UK dogs from more than 150 breeds and crossbreeds. The full paper was published in Scientific Reports.

Key findings:

• The median life expectancy across all dogs was 12.5 years.
• Large breeds had a 20% higher risk of a shorter lifespan than small breeds.
• Flat-faced breeds had a 40% higher risk of shorter lives than dogs with typical face shapes.
• Females lived slightly longer than males, at 12.7 years compared with 12.4.

The study also noted that these factors can stack up. Medium-sized, flat-faced male dogs were nearly three times more likely to live shorter lives than small, long-faced females.

10 Breeds With Short Life Expectancies

The first four numbers below are median lifespans from the UK study. The rest are life expectancy ranges from each breed's AKC profile. They come from different sources and methods, so treat them as a general guide, not a prediction for your dog.

A few patterns stand out. Most of these breeds are giants. The AKC's Dogue de Bordeaux profile lists males at 110 pounds and up, and the Irish Wolfhound at around 105 to 120 pounds. The French Bulldog and Bulldog are the exceptions: they're not giants, but their flat faces put them in the higher-risk group.

Why Size Matters So Much

In most of the animal kingdom, bigger species live longer. Elephants outlive mice. Dogs flip that pattern: within the species, bigger dogs tend to die younger.

The AKC's guide to dog aging explains that researchers still haven't solved this puzzle. It describes research finding that every 4.4 pounds of body mass reduced a dog's life expectancy by about a month. Possible explanations include larger dogs developing age-related illnesses sooner, and fast growth leading to a higher chance of abnormal cell growth and cancer.

Bigger dogs also reach their senior years earlier. Our guide to 6 years in dog years explains why a giant breed at six may already be a senior, while a small dog the same age is in its prime.

Why Flat Faces Matter

Flat-faced dogs have shortened airways, which can make breathing and staying cool harder. The UK study didn't pin down specific causes of early death, but it flagged flat-faced breeds as a group that needs more research. For more on breathing-related care, see our Boston Terrier feeding guide, which covers why keeping a flat-faced dog lean matters.

How to Support a Short-Lived Breed

You can't change your dog's genetics, but good daily care still makes a real difference to how well those years go.

1. Keep them lean. Extra weight puts more strain on joints and, for flat-faced dogs, on breathing. Measure meals and count treats.
2. Feed for their size. Giant puppies have specific growth needs. Our guide to large breed dog food covers what to look for.
3. Start senior care early. Ask your vet when your dog should move to senior checkups. For many giant breeds, that's earlier than you'd expect.
4. Watch the weather. Flat-faced breeds can struggle in heat and humidity. Plan walks for cooler parts of the day.
5. Focus on quality of life. As your dog ages, tools like a quality of life scale can help you and your vet track how they're doing.

Practical Takeaways

• The median lifespan across all dogs in the 2024 UK study was 12.5 years.
• Giant breeds and flat-faced breeds tend to have the shortest lives.
• The Caucasian Shepherd had the lowest median lifespan in the UK data, at 5.4 years.
• Size matters: researchers estimate every 4.4 pounds of body mass costs about a month of life expectancy.
• Lean body weight, size-appropriate food, and early senior care help short-lived breeds thrive.

Curious about the other end of the scale? See our list of dogs that live the longest, or read our full guide to how long dogs live.