844-436-7691
The short answer: Great Danes live a median of 8.9 to 10.6 years depending on the dataset: 8.90 years among 113 Great Danes that died under UK primary veterinary care (2026 VetCompass giant-breed study), and 10.6 years in the 2024 UK breed-longevity study of 1,986 Great Danes, which ranked the breed 138th of 156. The AKC's "8 to 10 years, some only 6 or 7, a lucky few 12" matches. The Great Dane is the textbook "heartbreak dog" for three reasons: dilated cardiomyopathy (a UK screening study found signs of it in 35.6% of 107 apparently healthy Danes, and it is inherited as a dominant trait), bloat (giant breeds suffer 26 cases per 1,000 dog-years and 29% of cases are fatal), and bone cancer (Great Danes have 34× the odds of a crossbred dog). Females outlive males by about 10 months in giant breeds. Below: every lifespan figure with its source, what Danes die of and at what age, the heart and bloat questions in detail, and what to do at each stage of a short, big life.
Written by Marc Brannigan, Co-Founder & CEO of HempMy Pet. Last updated 26 October 2026. Part of our breed lifespan series.
Great Dane Lifespan: The Numbers
The "6 to 8 years" you see on insurance sites and the "11 to 13" in Facebook groups are both wrong on average. Here is what the population studies measured.
| Figure | What it measures | Source | Take |
|---|---|---|---|
| 10.6 years (95% CI 10.4–10.9) | Median lifespan, 1,986 UK Great Danes (864 deaths), vet, insurance and registry records | McMillan et al., Scientific Reports 2024, 584,734 dogs | Rank 138 of 156 breeds; hazard of death 1.27× the all-dog average. The optimistic end of the real range. |
| 8.90 years | Median age at death, 113 Great Danes under UK primary veterinary care, 2019 | VetCompass giant-breed study, Companion Animal Health & Genetics 2026 (2,623 Great Danes in the population) | Primary-care deaths skew toward dogs that died of something; the pessimistic end. All 29 giant breeds together: 8.94 years. |
| 8–10 years | Breed expectation; "some only 6 or 7, a lucky few 12" | American Kennel Club | Honest, and the AKC's own caveat is accurate. |
| 9.31 vs 8.49 years | Median age at death, females vs males, all giant breeds (1,063 deaths) | VetCompass 2026 | Females live about 10 months longer (p < 0.001). Not broken out for Great Danes alone. |
| 87.8% | Share of giant-breed deaths that were euthanasia | VetCompass 2026 | Most Great Danes do not die; their owners make the decision. That shapes what "lifespan" means for this breed. |
| 60.5 kg (133 lb) | Median adult bodyweight, UK Great Danes | VetCompass 2026 | The heaviest common breed in the study after the Saint Bernard. Weight is the reason for almost everything below. |
Sources: McMillan KM et al., Longevity of companion dog breeds: those at risk from early death, Scientific Reports 2024 (Supplementary Table S3) · O'Neill DG et al., Giant dog breeds under primary veterinary care in the UK: demography, common disorders and mortality, Companion Animal Health and Genetics 2026 · AKC, Great Dane Life Span & Health Issues.
In the UK giant-breed study, nearly nine in ten Great Danes were euthanised rather than dying on their own. The breed's lifespan is less a number than a decision that most owners end up making around year nine.
How the Great Dane Compares
| Breed | Median lifespan (McMillan 2024) | Median age at death, UK primary care (VetCompass 2026) |
|---|---|---|
| Labrador Retriever | 13.1 | — |
| Alaskan Malamute | — | 11.2 |
| Newfoundland | — | 10.3 |
| Rottweiler | 10.6 | — |
| Great Dane | 10.6 | 8.90 |
| Bullmastiff | 10.2 | 9.09 |
| Bernese Mountain Dog | 10.1 | 7.7 |
| Mastiff | 9.0 | 9.64 |
| Dogue de Bordeaux | — | 7.71 |
| Saint Bernard | — | 6.76 |
| Irish Wolfhound | — | 7.24 |
Within giant breeds, the Molossoid (mastiff-type) breeds, which include the Great Dane, lived a median of 8.42 years against 9.97 for non-Molossoid giants (p < 0.001). Compare our guides to the Rottweiler, Bernese Mountain Dog and Labrador.
What Great Danes Die Of
Three diseases account for the "heartbreak dog" nickname. Two of them can kill a dog that looked healthy at breakfast.
The heart muscle weakens and the chambers stretch until the heart cannot pump. In a UK screening study of 107 client-owned Great Danes with no known heart disease, 35.6% scored as affected, rising to 47% with breed-corrected reference ranges; ventricular arrhythmias were present in 54% of affected dogs, and pedigree analysis pointed to autosomal dominant inheritance: one affected parent is enough. DCM often announces itself as sudden collapse or sudden death, which is why "collapse" was the second most common recorded cause of death in UK giant breeds (9.5%) and "heart disorder" the third (4.1%). Annual echocardiogram and Holter screening from age 3 is the breed-club recommendation.
The stomach fills with gas and twists, cutting off its own blood supply. In the Purdue prospective study of 1,914 show dogs, giant breeds had 26 GDV cases per 1,000 dog-years, incidence rose with age, and 28.6% of dogs that bloated died. The Great Dane's deep, narrow chest makes it the breed most associated with GDV in the veterinary literature. Retching without producing anything, a tight or swelling belly, restlessness and drooling mean an emergency clinic within the hour; a prophylactic gastropexy (tacking the stomach, often done at spay or neuter) removes the twist from the equation.
In the VetCompass osteosarcoma study of 905,552 UK dogs, Great Danes had the third-highest annual prevalence of any breed (0.87%) and 34× the odds of a crossbred dog (OR 34.24, 95% CI 17.8–65.8); median age at diagnosis across breeds was 9.6 years. Risk rose with bodyweight and leg length, which is the Great Dane in one sentence. Neoplasia overall was the leading recorded cause of death in UK giant breeds (12.4%, median age 8.5). A limp or a hard swelling on a leg in a Dane over 5 is radiographed the same week.
Cervical spondylomyelopathy: the bones of the neck compress the spinal cord, producing a wobbling, uncoordinated hind-end gait. The Great Dane is the classic breed for the bony (osseous) form, which can appear in young adults. It is a quality-of-life disease more than a killer, but it is one of the reasons a 7-year-old Dane may "go off its legs".
Musculoskeletal disease was the second most common disorder group in UK giant breeds (13.5% in one year), and 8% of them were recorded as overweight. A 130-lb dog that cannot get up cannot be carried, and that, more than any diagnosis, is what ends most Great Dane lives: the euthanasia rate of 87.8% is largely a mobility and dignity decision.
A Great Dane puppy goes from 1 lb to 100 lb in a year. Fed too rich or too much, the bones outgrow their own strength (panosteitis, HOD, OCD). Large-breed puppy food with controlled calcium, fed to a lean outline, no added supplements, and no forced exercise on growing joints is the evidence-based path; the orthopaedic problems of adulthood are usually bought in the first year.
Sources: Stephenson HM et al., Screening for dilated cardiomyopathy in Great Danes in the United Kingdom, JVIM 2012 · Glickman LT et al., Incidence of and breed-related risk factors for gastric dilatation-volvulus in dogs, JAVMA 2000 · O'Neill DG et al., Dog breeds and conformations predisposed to osteosarcoma in the UK: a VetCompass study, Canine Medicine and Genetics 2023 · VetCompass giant-breed study 2026 (above).
Why Great Danes Live So Short a Life
Across dog breeds, bigger means shorter: in the 2024 study, small breeds had a median of 12.7 years, medium 12.5 and large 11.9, and the giant breeds sit below all of them. The usual explanation is that giant dogs grow so fast that cell division and tissue repair run at a pace the body cannot sustain, and the diseases of that pace (bone cancer, a heart muscle that cannot keep up with a 130-lb body, a stomach that swings loose in a deep chest) arrive early. The 2026 VetCompass authors went further and suggested welfare-based limits on how big dogs should be bred, because the "higher disorder burden and shorter lifespans" they measured are the direct product of selecting for size. None of this is fixable by an owner; what an owner can do is not add to it.
Great Dane Life Stages
With a median around 9 to 10, a Great Dane is a senior at about 6 or 7 and geriatric from 8. The diseases above are mostly diseases of years 4 to 8.
| Age | Stage | What to do |
|---|---|---|
| 0–18 months | Growth | Large-breed puppy food, lean, no calcium supplements, no jogging or stairs marathons. Cardiac auscultation at every puppy visit. Discuss gastropexy timing and neuter timing (after 18–24 months for a giant breed) with the vet. |
| 18 months–4 years | Young adult | Keep the waist. Learn the bloat signs and the route to the emergency clinic. Gastropexy if not done. Baseline echocardiogram at 3. |
| 4–6 years | Prime, the disease window opens | Yearly echo and Holter if the breeder's line has DCM, or any murmur or fainting. Any limp over two weeks is radiographed. Twice-yearly exams from 5. |
| 6–8 years | Senior | Traction on floors, a raised bowl for comfort (not for bloat prevention; it does not help), shorter walks more often, weight at the low end of normal. Joint support is now daily. See our arthritis guide and senior-dog hemp guide. |
| 8+ years | Geriatric | Past the primary-care median. A quality-of-life scale (ability to rise, eat, enjoy), pain control with the vet, and a plan for the day the dog cannot stand. Every month is earned. |
How to Help a Great Dane Live Longer
- Buy from heart-screened parents. DCM is dominantly inherited in this breed. Ask for the sire's and dam's echocardiogram and Holter results, and walk away from a breeder who does not have them.
- Gastropexy. The single intervention that removes the breed's most sudden killer. Ask about it at the neuter appointment, or as a standalone laparoscopic procedure.
- Keep the dog lean for life. The 14-year Labrador feeding trial added 1.8 years of median life and delayed arthritis by years; in a 130-lb breed with the joints and heart described above, the effect is at least as large. Ribs easy to feel, waist visible from above.
- Grow the puppy slowly. Large-breed formula, measured meals, no supplements, no forced exercise until the growth plates close.
- Do not neuter early. The giant-breed data are thinner than for Rottweilers, but every large-breed study points the same way: wait until skeletal maturity (18 to 24 months in a Dane) to limit joint disease and osteosarcoma risk.
- X-ray every limp after 4. Early amputation and chemotherapy for osteosarcoma is the difference between months and a year or more.
- Twice-yearly vet visits from 5, with heart auscultation and bloodwork. The breed's killers are findable early on exam.
- Protect the joints with muscle. Steady daily exercise through middle age, swimming where possible, no weekend-warrior pattern. Our fish oil, green-lipped mussel and glucosamine entries cover which joint supplements have evidence.
Where Hemp Fits
Hemp has nothing to offer against DCM, bloat or bone cancer, and no supplement does. Where it has evidence is the fourth problem, the one that actually ends most Great Dane lives: joint comfort and mobility in the senior years. HempMy Pet's 90-day study of 37 dogs with chronic joint discomfort, overseen by Dr. Robin Downing, DVM with Colorado State University researchers, found a benefit in 30 of the 32 dogs that completed it, and a 2024 placebo-controlled trial in 20 arthritic dogs found a 46% drop in pain scores at 2 mg/kg twice daily. For a 130-lb Dane that is a lot of oil, which is why we make a 5000mg formula for horses and the largest dogs; served by weight with food, it belongs in years 6 through 9 alongside the vet's pain plan, not instead of it.
For the biggest dogs in their senior years
5000mg Large Dog & Horse Formula
Giant breeds · the economical choice over 100 lb
$199
1000mg Hemp Seed Oil
Dogs 40 lb and up · with food, twice daily
$99
Large Dog Hemp Treats
5mg each · pumpkin · 40 lb and up
$32
Grown on our own certified-organic Colorado farm, formulated in-house, third-party tested every batch. All hemp for dogs →
Frequently Asked Questions
How long do Great Danes live?
Between about 9 and 10.6 years on average: 8.90 years median age at death among UK Great Danes under primary veterinary care (2026), and 10.6 years median lifespan in the 2024 UK breed study of 1,986 Danes, which ranked the breed 138th of 156. The AKC's 8 to 10 years, with a lucky few reaching 12, is accurate.
What is the leading cause of death in Great Danes?
Cancer, especially bone cancer, followed by sudden collapse (usually the heart) and heart disease itself. In the UK giant-breed study, neoplasia caused 12.4% of recorded deaths, collapse 9.5% and heart disorders 4.1%. Dilated cardiomyopathy and bloat are the two that kill suddenly; osteosarcoma is the one that kills slowly. Most Great Danes (88%) are ultimately euthanised, often for loss of mobility.
Why is a Great Dane's life expectancy so short?
Size. Across all breeds, bigger dogs die younger (small breeds 12.7 years median, large 11.9, giants under that), and the Great Dane is one of the heaviest breeds at a median 133 lb. Rapid growth and sheer mass bring bone cancer, a heart muscle that fails under the load, a deep chest that bloats, and joints that give out, all in the 6-to-9-year window.
Why are Great Danes called the "heartbreak breed"?
Partly because they die young, and partly because of their heart: dilated cardiomyopathy is common (35.6% of 107 apparently healthy UK Danes showed signs of it on screening) and dominantly inherited, and it can cause sudden death in a dog that seemed fine. Owners who have lost a Dane to DCM or bloat coined the name.
Can a Great Dane live to 12 or 15?
Twelve, occasionally; the AKC calls those dogs "a lucky few". Fifteen is at the extreme edge of the range (the oldest giant-breed deaths in the UK study were 15 to 16 years, across all 29 breeds). A 12-year-old Great Dane is the breed's equivalent of a human centenarian.
How old is the oldest Great Dane?
There is no verified longevity record for the breed. The famous record-holding Danes (Zeus and Freddy, Guinness's tallest dogs) died at 5 and 8½. Owner reports of 13- to 15-year-old Danes exist but are undocumented; the UK primary-care data recorded giant-breed deaths up to 16.1 years, with no breed given.
Which dog can live 25 years?
Almost none. The verified record is Bluey, an Australian Cattle Dog that lived 29 years 5 months (1910–1939). Small and medium breeds routinely reach 15 to 18; no giant breed comes close. For a Great Dane, 25 years is more than two full lifetimes.
Do male or female Great Danes live longer?
Females, by about 10 months in UK giant breeds as a group (median 9.31 vs 8.49 years at death, p < 0.001). The Great Dane was not analysed separately, but the pattern holds across large and giant breeds. Early neutering appears to shorten life in large breeds; wait until skeletal maturity.
At what age is a Great Dane a senior?
About 6 to 7, using the rule that the last quarter of a breed's expected lifespan is "senior", and geriatric from 8. Twice-yearly vet visits should begin at 5, because the breed's major diseases typically appear between 4 and 8.
Do blue, black, harlequin or merle Great Danes live longer or shorter?
No colour has a documented lifespan difference. The one genetic caveat is merle: breeding two merles produces "double merle" puppies with a high rate of deafness and eye defects, so a reputable breeder never pairs merle to merle or merle to harlequin. Colour-focused breeders selling "rare" blues or lilacs at a premium are rarely the ones with heart clearances.
Does bloat kill Great Danes, and can it be prevented?
Yes, and mostly yes. Giant breeds suffer about 26 bloat cases per 1,000 dog-years and 29% of cases are fatal; the Great Dane is the breed most associated with it. A prophylactic gastropexy stops the stomach twisting, which is the lethal part. Smaller meals and no hard exercise after eating help; raised bowls do not. Retching with nothing coming up and a swelling belly is an emergency.
The Short Version
Nine to ten and a half years is the honest range, and nearly nine in ten Great Danes are euthanised rather than dying on their own. The heart, the stomach and the bones are what take them. Buy from heart-screened parents, get the gastropexy, grow the puppy slowly, keep the adult lean, and X-ray every limp. Do that, and 12 goes from "a lucky few" to a realistic goal.
Shop Hemp for Dogs → Arthritis in Dogs Guide
Rottweiler · Bernese Mountain Dog · German Shepherd · Labrador · Golden Retriever · Standard Poodle · Husky · Boston Terrier · French Bulldog · Dachshund · Boxer
Marc co-founded HempMy Pet in 2016 with his business partner Natalie Mondine, the company's COO. HempMy Pet breeds its own hemp genetics, grows them on its certified-organic Colorado farm, and formulates every batch in-house under human-grade standards — seed to sale, nothing sourced overseas. Every batch is third-party tested and the certificates of analysis are published. He is not a veterinarian. More about us.
HempMy Pet ran its own 90-day study of 37 dogs with chronic joint discomfort. Of the 32 that completed it, 30 (93%) showed a benefit, and 94% of owners reported their dog's quality of life had improved. It was overseen by Dr. Robin Downing, DVM, MS of the Downing Center for Animal Pain Management, with Lori Kogan, Ph.D. and Peter W. Hellyer, DVM of Colorado State University's College of Veterinary Medicine & Biomedical Sciences, and published in the Journal of the American Holistic Veterinary Medical Association. It was an open-label pilot with no control group. Read the methodology.
Why Dr. Downing: in 2005 she became only the third veterinarian in the world credentialed as a Diplomate of the American Academy of Pain Management. She founded the International Veterinary Academy of Pain Management, is a Diplomate of the ACVSMR, a Certified Veterinary Pain Practitioner and a Certified Canine Rehabilitation Practitioner, and was the AVMA's 2020 Bustad Companion Animal Veterinarian of the Year. Chronic joint pain is her life's work. Read the published paper (PDF).
Every lifespan, prevalence and odds figure on this page is taken directly from the peer-reviewed studies linked in the text (McMillan 2024, the VetCompass giant-breed study 2026, Stephenson 2012, Glickman 2000, O'Neill 2023 osteosarcoma, Kealy 2002). The 2024 placebo-controlled hemp trial referenced is Frontiers in Veterinary Science 2024 (PMC11272626). This article is general information for dog owners, not veterinary advice, and is reviewed as new evidence is published.
These statements have not been evaluated by the Food and Drug Administration. These products are not intended to diagnose, treat, cure, or prevent any disease. This article is general information, not veterinary advice. If your dog is unwell, contact your veterinarian.
