Golden Retriever Lifetime Study: Canine Lifetime Health

The Golden Retriever Lifetime Study is an observational study that follows 3,044 golden retrievers through their lives to look for the dietary, genetic, and environmental risk factors behind cancer and other diseases. Papers that use its dogs report, for example, that 233 of them (7.65%) had been diagnosed with hemangiosarcoma as of September 2022, and that urine herbicide levels did not differ between golden retrievers with lymphoma and matched dogs without it.

Canine Lifetime Health: How The Study Works

Morris Animal Foundation, a nonprofit founded in 1948 that funds animal health research, started the Canine Lifetime Health Project in 2012 as a database where dog parents who want to join clinical research can register. According to Guy and colleagues, who described the plan in 2015, the Golden Retriever Lifetime Study was the first study the foundation ran under that project. The 2015 paper says all funding for the study is provided by the foundation, with gifts from several other groups. Visit the Morris Animal Foundation.

The people running it write about it in a 2022 cohort profile in PLOS ONE. The authors work for Morris Animal Foundation and for the Flint Animal Cancer Center at Colorado State University. They report that 3,044 golden retrievers in the United States, aged 6 months to 2 years, were enrolled between June 2012 and April 2015. The main outcomes the study is built around are hemangiosarcoma, lymphoma, osteosarcoma, and high-grade mast cell tumors.

Once a dog is in, the dog’s parent fills out an annual online questionnaire. The questionnaire asks about lifestyle, environmental exposures, physical activity, reproductive history, behavior, diet, medications, and diagnoses, and it includes flea, tick, and heartworm preventives. The dog’s own veterinarian also fills out a yearly questionnaire and does a physical exam with samples collected for a biobank. When a dog dies, the study asks for the medical records and a necropsy, which the dog’s parent decides on.

Where The Study Stands

The cohort profile gives its numbers as of May 31, 2021: 2,251 dogs were still taking part, 352 had died, and 441 were lost to follow-up. The authors estimated that most of the dogs will have died around January 2027.

The Golden Retriever Foundation says its mission includes “RESEARCH to further understand the diseases and genetic disorders that afflict all dogs and Golden Retrievers in particular”. The 2015 paper by Guy and colleagues lists the Golden Retriever Foundation among the groups that gave gifts to the Golden Retriever Lifetime Study.

What Published Papers Have Reported

Each paper below names the Golden Retriever Lifetime Study as its source of dogs. The table gives the year and what was measured. A result in one group of dogs says how often something showed up or did not, and it does not show what caused a disease.

The hemangiosarcoma paper adds that the visceral form was the most common, with 211 of the 3,044 dogs (6.9%) diagnosed. The authors also report a one-year survival probability of 1.42% for visceral hemangiosarcoma and 84.6% for the cutaneous form.

The radon paper found one difference. Dogs with lymphoma lived closer to wastewater wells than the matched dogs did, 123 kilometers against 206 (P = .01). But the share of dogs living within 20 kilometers of a fracking well was 11.5% for dogs with lymphoma and 6.7% for the others, and the authors report that difference was not significant. They conclude that closer sources of chemical exposure should be measured, including individual household radon and household VOC (volatile organic compound) concentrations.

The herbicide paper did a second test in the lab. Both 2,4-D and glyphosate were genotoxic to healthy canine blood cells at concentrations of 0.10 micromolar and higher. When the authors estimated blood levels from the urine results, no dog reached the estimated genotoxic level for glyphosate, and 4 of 30 goldens with lymphoma (13.3%) and 2 of 30 matched dogs (6.7%) reached it for 2,4-D (p = 0.67).

In the blood paper, the aging clock predicted age with an accuracy of R = 0.78, using 16,678 veterinary visits. The model with all blood markers scored a C-index of 0.763 for lifetime mortality and an AUC of 0.817 for one-year mortality.

How Common Is Cancer In Golden Retrievers?

Three cancer numbers come from three different kinds of source. Guy and colleagues wrote in 2015 that the anticipated frequency of cancer in the study group was “approximately 60%”, based on a Golden Retriever Club of America survey. That is an estimate made before the study followed the dogs, not a measured result.

A measured number comes from Kent and colleagues in 2018. They went through 9,677 necropsies at one veterinary academic center and found 655 golden retrievers, with age known for 652. Of those 652, 424 (65.0%) died of cancer. The authors describe the center as a referral population, so the figure describes dogs sent to a specialty hospital, not all goldens. The most common diagnoses were hemangiosarcoma (22.64%) and lymphoid neoplasia (18.40%), and the median age at death was 9.15 years.

The third number comes from inside the study. As of the 2021 cohort profile, 352 dogs had died and 70% of those deaths (248 dogs) were attributed to cancer. Those are the dogs that had died by May 31, 2021, so the share can change as more dogs die.

Other Lifetime Health Studies

With 50,787 dogs, Salt et al. 2019 is the most comprehensive study on weight and life span that this page cites. The authors looked at neutered client-owned dogs from about 900 North American veterinary hospitals, covering 12 breeds. They compared dogs aged 6.5 to 8.5 years that were overweight with dogs of normal body condition, then followed how long each group lived. Overweight dogs had a greater risk of death in all of the breeds, with hazard ratios from 1.35 for German Shepherd Dogs to 2.86 for Yorkshire Terriers, and a shorter median life span in all of them. Yorkshire Terriers, for example, lived a median of 13.7 years when overweight against 16.2 years at normal condition.

The Golden Retriever Lifetime Study cohort profile reports that 37% of its dogs were classed as overweight or obese.

Bellumori and colleagues tested whether mixed-breed dogs have a lower cancer incidence than purebred dogs across 24 genetic disorders, using 27,254 cases from 1995 to 2010. Cancers, hip dysplasia, lens luxation, patellar luxation, and both hypo- and hyperadrenocorticism were among the 13 disorders with no difference. Purebred dogs were more likely to have 10 others, such as cataracts, hypothyroidism, elbow dysplasia, and dilated cardiomyopathy. Mixed-breed dogs were more likely to have a ruptured cranial cruciate ligament.

Golden Retriever Health Issues The AKC Lists

The American Kennel Club puts the golden retriever’s life expectancy at 10 to 12 years. It says goldens are “generally healthy dogs” and that responsible breeders screen breeding stock for several conditions: hip and elbow dysplasia, certain heart diseases such as subvalvular aortic stenosis, and eye conditions that include juvenile cataracts, pigmentary uveitis, and progressive retinal atrophy. The AKC adds that the Golden’s ears should be checked weekly for signs of infection and the teeth brushed often. Read more about golden retriever puppies.

Food, Exercise, And Veterinary Visits

The study’s questionnaires ask about diet, physical activity, and preventives. On food, the AKC says “A high-quality dog food appropriate for the dog’s age (puppy, adult, or senior) will have all the nutrients the breed needs.” It adds that “Some Goldens can become overweight, so watch your dog’s calorie consumption and weight level.”

The Association of American Feed Control Officials says on its Understanding Pet Food page that “AAFCO is a non-profit organization that sets standards for both animal feeds and pet foods in the United States.” The same page says that “AAFCO does not regulate, test, approve or certify pet food.”

Read more about vegetables and fruits.

On exercise, the AKC says that “Like most Sporting breeds, Goldens need plenty of daily exercise.”

On veterinary care, the study design includes a yearly veterinary exam, and the veterinarian’s questionnaire includes vaccination history and prescription medication history. VCA Animal Hospitals says on its tick page that “No effective tick preventative is completely without potential side effects, but the risk of getting a severe disease from tick exposure generally outweighs the risk of a side effect occurring.” Read more about Regular preventive treatments.

FAQ

What has the Golden Retriever Lifetime Study found?

Hillman and colleagues reported that 233 of the 3,044 dogs (7.65%) had been diagnosed with hemangiosarcoma as of September 2022. The table above lists three more papers on lymphoma and aging.

How many dogs are in the study?

3,044 dogs were enrolled. Labadie and colleagues write that 3,044 United States golden retrievers aged 6 months to 2 years finished baseline enrollment from June 2012 to April 2015.

Do mixed-breed dogs get cancer less often than purebred dogs?

One large study found no difference. In Bellumori et al. 2013, “No differences in expression of 13 genetic disorders were detected between purebred dogs and mixed-breed dogs”, and the list the authors give for those 13 includes cancers.

How long do golden retrievers live?

The AKC says 10 to 12 years. In the Kent 2018 necropsy group at one academic center, the median age at death was 9.15 years.

Sources

• Guy et al., 2015, Philosophical Transactions of the Royal Society B: the study design
• Labadie et al., 2022, PLOS ONE: the cohort profile
• Kent et al., 2018, PLOS ONE: cancer-related deaths in golden retrievers at one academic center
• Hillman et al., 2023, Veterinary and Comparative Oncology: hemangiosarcoma
• Tindle et al., 2024, Journal of Veterinary Internal Medicine: radon, fracking wells, and lymphoma
• Tindle et al., 2025, Veterinary and Comparative Oncology: herbicides and lymphoma
• Perez et al., 2025, Aging Cell: blood tests, aging clocks, and mortality
• Salt et al., 2019, Journal of Veterinary Internal Medicine, and Bellumori et al., 2013, JAVMA: linked in the text above
• American Kennel Club, Golden Retriever breed page
• VCA Animal Hospitals, Ticks in Dogs

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