Cancer is one of the most important causes of death among dogs, particularly in later life. In certain breeds, the proportion of recorded deaths attributed to tumours is so high that it raises serious questions about genetics, breeding, environmental exposure and prevention. Studies have reported a substantial cancer-related share of deaths in Flat-Coated Retrievers, Bernese Mountain Dogs, Irish Water Spaniels, Golden Retrievers, Rottweilers, Boxers and Leonbergers. Scottish Terriers have a predisposition to specific tumour types, which is not the same as an equally high overall cancer mortality share. In some breeds, cancer accounts for more than half of recorded deaths. These statistics do not give the probability of any individual dog developing cancer, but they justify closer attention to inherited risk and modifiable influences.<\/p>\n
Are dogs developing cancer more often today than in the past? What role do genes and environmental factors play? Could everyday nutrition influence cancer risk? The answers are not simple. Mortality studies offer useful evidence, and an increasing number of scientific papers investigate natural compounds that may affect biological pathways involved in tumour development.<\/p>\n
Several studies of canine mortality have found neoplastic diseases among the most frequent recorded causes of death. In some investigated populations, cancer was the single most common cause. This does not mean all dogs face the same risk. The statistics are influenced by age, breed, body size, genetic background and how researchers established the cause of death.<\/p>\n
We must also distinguish cancer’s proportion of recorded deaths from the probability of developing cancer. A high share of cancer-related deaths does not tell us how many dogs will develop the disease in their lifetimes, or whether cancer incidence has increased over time. That requires long-term comparisons of dogs with similar ages, breeds and backgrounds.<\/p>\n
Age is one of the major cancer risk factors. Genetic changes can accumulate in cells over the years and contribute to tumour formation. Many cancers are therefore diagnosed more often in older dogs. But that alone does not explain cancer’s large share of recorded deaths.<\/p>\n
Average lifespan differs greatly between breeds, and the available studies do not establish that dogs today generally live longer than in earlier decades. For example, a Swiss study of Bernese Mountain Dogs reported a median lifespan of 8.4 years. That neither proves that all dogs’ lifespans are declining nor supports a simple explanation that cancer mortality must be high because dogs now live longer. We need to consider genetics, breeding, environment and lifestyle alongside age.<\/p>\n
Inherited factors influence the occurrence of certain tumour types. Golden Retrievers, for example, are known to be predisposed to haemangiosarcoma, lymphoma and some other cancers. Predisposition does not mean a dog will inevitably develop the disease, only that its risk may be greater than that of a dog from another genetic background.<\/p>\n
A Swiss study attributed 58.3% of recorded Bernese Mountain Dog deaths to neoplastic disease. In a separate Dutch study, at least 55.1% of deaths were associated with malignant tumours. The methods and diagnostic confirmation differed, but the results were strikingly similar: neoplasia accounted for more than half of registered deaths in both populations.<\/p>\n
In the same Dutch study, the share of deaths attributed to malignant neoplasms in Flat-Coated Retrievers was 63.8%. High cancer-related mortality is therefore not limited to a single breed. Median lifespan in the Swiss Bernese Mountain Dog population was approximately 8.4 years [1].<\/p>\n
Why is the proportion so high in certain breeds? One possible explanation is genetic predisposition. Selective breeding can make particular inherited traits and disease-associated variants more common within a population. But differences cannot all be assigned to genes alone: body size, environment and other factors may also play roles. This is precisely why unusually high mortality shares should prompt research into factors we may be able to influence.<\/p>\n
Dogs share the air, living spaces and much of the environment of their human families. They may encounter household chemicals, pesticides and many other exposures. Studies have investigated associations between certain herbicides or domestic pesticides and canine lymphoma. But association is not proof of causation. Even if more tumours are observed among exposed dogs, that does not by itself establish that the exposure caused them.<\/p>\n
Cancer is often the result of a long, multifactorial process in which genes, age and environmental factors may interact. Without sufficiently strong evidence we cannot identify one particular household product, food ingredient or chemical as the cause of cancer in dogs. Still, avoiding unnecessary contact with substances known to be harmful is a reasonable precaution.<\/p>\n
Diet and lifestyle influence a dog’s metabolism, body composition and wellbeing. Could they also affect cancer risk? In humans, obesity and inactivity are strongly associated with several cancers. In dogs, the evidence is less extensive, and findings in humans cannot automatically be applied to other species. Fat tissue is not merely an energy reserve; it also participates in hormonal and inflammatory processes.<\/p>\n
Maintaining a healthy body condition supports general health and reduces the risk of various other diseases. Whether and to what extent it reduces the incidence of individual canine cancers needs further investigation. Suitable regular exercise likewise supports muscles, metabolism and wellbeing, but it is not an established cancer-prevention treatment. Nor has any single food, supplement or ingredient been proved to prevent cancer in dogs. That does not mean the possible effects of bioactive dietary compounds are not worth studying.<\/p>\n
One subject explored in integrative veterinary medicine is the possible role of chronic inflammation in tumour development. Inflammation is a normal protective response to injury and infection. When it becomes prolonged, however, it can under certain conditions influence cell division, tissue damage and repair, and signalling pathways involved in cancer. Not all tumours arise because of inflammation, and lowering an inflammatory marker does not automatically mean that cancer risk is reduced.<\/p>\n
For this reason, integrative veterinarians also consider foods and natural compounds studied for anti-inflammatory, antioxidant and possible anti-tumour properties. Examples include sulforaphane, lycopene, curcumin and certain mushroom polysaccharides.<\/p>\n
It is impossible to prevent every case of cancer. Some tumours develop through inherited susceptibility, age-related cellular changes and influences beyond an owner’s control. But that does not make everyday decisions meaningless. Keeping a suitable body weight, encouraging appropriate exercise, offering balanced food and reducing unnecessary harmful exposures are reasonable ways to support overall health.<\/p>\n
It also matters to notice changes. New lumps, unexplained weight loss, persistent digestive complaints, unusual fatigue or other ongoing symptoms should be discussed with a veterinarian. Earlier detection can improve treatment options for certain cancers. Besides detecting illness early, we may ask how everyday nutrition can support the body before disease occurs. This is where bioactive substances found in plants and fungi become interesting.<\/p>\n
Integrative veterinarians discuss several foods and natural compounds whose possible effects on inflammation, oxidative stress or tumour development have been studied. These include broccoli sprouts, tomatoes, turmeric and medicinal mushrooms. A biological effect seen in a study does not automatically prove cancer prevention, and not every natural preparation is risk-free. Even so, suitable foods may add variety to a dog’s diet and help support health.<\/p>\n
Broccoli, especially its sprouts, is of interest because it contains glucoraphanin, which enzymes can convert to sulforaphane. Researchers have investigated sulforaphane’s antioxidant, anti-inflammatory and potential anti-tumour effects, including its influence on cellular defence mechanisms and signalling pathways linked to cancer.<\/p>\n
In healthy dogs, sulforaphane metabolites from a glucoraphanin-containing preparation have been detected in the bloodstream. Another small study examined biological measures related to lymphoma in dogs receiving sulforaphane. These results do not prove that eating broccoli or sprouts prevents cancer, but provide a reason to investigate further. Finely chopping broccoli ruptures plant cells and allows glucoraphanin to contact the enzyme involved in sulforaphane formation.<\/p>\n
How to offer it?<\/strong> Small amounts of finely chopped broccoli, lightly cooked if needed, can be offered. Introduce sprouts cautiously and monitor digestion. Raw sprouts can carry infectious microbes, so extra care is appropriate for dogs with weakened immunity. A fresh-food menu may contain a higher vegetable proportion than a small addition to complete feed, but that is not a recommended dose of broccoli sprouts. As a general starting point, unbalanced extras and treats together should usually remain within 10% of daily calorie intake when complete feed is the main food.<\/p>\n Lycopene is the carotenoid pigment that gives ripe tomatoes their red colour. Its antioxidant and possible anti-tumour properties have been studied. Laboratory experiments with canine osteosarcoma cells have reported changes in cell activity and programmed cell death under certain conditions. These experiments do not show that eating tomatoes prevents bone cancer or other tumours. They show why lycopene is a subject of scientific interest.<\/p>\n Cooking can make lycopene more bioavailable by altering tomato cell structures; a little fat may also aid absorption. These observations come largely from food chemistry and human studies, not canine cancer-prevention trials. Longer cooking is not necessarily better, since results depend on processing methods and duration.<\/p>\n How to offer it?<\/strong> Peter Dobias recommends starting with one or two slices of ripe tomato and watching the dog’s response. A small amount of ripe red tomato or plain cooked tomato may be offered. Avoid green tomatoes, tomato leaves and stems, and sauces with onion, excessive salt or other unsuitable additions. Garlic safety depends on the quantity and method of preparation.<\/p>\n Turmeric contains curcuminoids, most famously curcumin. Its antioxidant, anti-inflammatory and potential anti-tumour effects have been investigated in laboratories and animal experiments. Integrative veterinary medicine takes particular interest in inflammatory signalling pathways. In experiments with canine cancer cell lines, turmeric extract has inhibited cancer-cell proliferation, but much more high-quality clinical research in dogs is needed to assess benefit and safety. These findings do not prove that adding turmeric to food prevents cancer.<\/p>\n How to offer it?<\/strong> Curcumin is relatively poorly absorbed. Combining it with fat may help absorption. A preparation used by some integrative veterinarians is golden paste, made with turmeric and fat; some recipes add black pepper, whose piperine can influence curcumin availability. The FendaF article Healing foods for your dog<\/a> covers the recipe and practical considerations.<\/p>\n An important precaution: turmeric and particularly concentrated curcumin supplements may affect blood clotting and the action of some medicines. Discuss their use with a veterinarian if a dog takes medicines affecting coagulation, anti-inflammatory drugs or cancer treatments, or is due to undergo surgery. Piperine can also influence drug metabolism; not every golden-paste recipe suits every dog.<\/p>\n Medicinal mushrooms have a long history of use, and their bioactive compounds have attracted growing research attention. Turkey tail (Trametes versicolor) is one familiar example; it contains polysaccharides that have been investigated for effects related to immune function.<\/p>\n A polysaccharide extract from turkey tail has been studied in dogs with haemangiosarcoma. An early pilot study of 15 dogs found encouraging results in a higher-dose group. A later study involving 101 dogs did not find improved survival when extract was added to doxorubicin chemotherapy. The extract-only group also did not perform better than the chemotherapy group. We cannot therefore claim that mushroom extracts prevent cancer or reliably improve survival. Integrative veterinarians, including Robert Silver, nevertheless discuss mushrooms as possible supportive options.<\/p>\n How to offer them?<\/strong> Ordinary dried mushroom powder is not the same as a concentrated, standardised extract. Their quantities cannot be compared directly. There is no universally established cancer-prevention dose for dogs. Concentrations of active compounds vary by product, and drug interactions, quality and the individual dog’s health matter. Veterinary advice is particularly important when a dog receives cancer treatment or medicines that influence the immune system.<\/p>\n When a dog eats a balanced complete diet, treats and other unbalanced additions are often recommended to make up no more than about 10% of daily calories. This limits the risk of disturbing the nutritional balance of the main feed. But the 10% rule is not a safety limit for each individual ingredient. It does not mean a dog can eat broccoli sprouts, turmeric or mushroom extracts equal to 10% of its daily calories.<\/p>\n Start ordinary foods in small amounts, add one new ingredient at a time, and observe digestion and wellbeing. With concentrated extracts and supplements, consider the specific product, its active ingredients and the dog’s needs. Discuss bioactive supplements with a veterinarian if the dog has a chronic disease, uses medication or is scheduled for surgery.<\/p>\n Scientific research requires us to distinguish two situations: good-quality studies sometimes show that an intervention does not produce the hoped-for result; at other times we simply lack enough studies to reach a firm conclusion. Those are not the same thing.<\/p>\n A compound’s anti-tumour activity in a laboratory does not establish that a dog will gain the same benefit by eating a food containing it. Yet a lack of clinical studies does not prove the compound has no biological effect at all. Practical choices should weigh possible benefit, evidence and risk. Adding a small amount of a suitable vegetable is different from using concentrated preparations at high doses. The aim is not to give as many supplements as possible, but to make considered decisions without introducing unnecessary risks.<\/p>\n Cancer’s large share of recorded canine deaths is an important health issue that cannot be explained by one simple factor. Age plays a role, but does not explain breed differences or the very high proportion of neoplastic deaths in some dog populations. Bernese Mountain Dog studies, in which cancer accounted for over half of registered deaths, highlight why it is important to investigate inherited susceptibility and other influences.<\/p>\n Not all cancers can be prevented, and no food or supplement offers a guarantee. That does not mean owners must remain passive. Balanced nutrition, appropriate body condition, regular movement, reduced avoidable environmental exposures and attentive health monitoring are steps we can take now. Bioactive compounds in food also deserve careful study, including integrative perspectives. Above all, we should distinguish proven effects, preliminary findings and unanswered questions. We cannot control every risk factor, but we can make informed choices that support dogs throughout their lives.<\/p>\n Note: these breed-specific percentages describe the distribution of recorded causes of death in the studied populations. Laboratory findings do not prove that the foods discussed prevent cancer in dogs.<\/em><\/p>\n","protected":false},"excerpt":{"rendered":" Cancer is one of the most important causes of death among dogs, particularly in later life. In certain breeds, the proportion of recorded deaths attributed to tumours is so high that it raises serious questions about genetics, breeding, environmental exposure and prevention. Studies have reported a substantial cancer-related share of deaths in Flat-Coated Retrievers, Bernese […]<\/p>\n","protected":false},"author":3,"featured_media":191737,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_jetpack_newsletter_access":"","_jetpack_dont_email_post_to_subs":false,"_jetpack_newsletter_tier_id":0,"_jetpack_memberships_contains_paywalled_content":false,"_jetpack_feature_clip_id":0,"_jetpack_memberships_contains_paid_content":false,"footnotes":"","jetpack_post_was_ever_published":false},"categories":[767,698,769],"tags":[],"class_list":["post-191725","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-general-health-prevention","category-health","category-tumours-lumps"],"acf":[],"featured_image_src":{"landsacpe":["https:\/\/fendaf.ee\/wp-content\/uploads\/2022\/08\/Cancer-as-a-cause-of-death-in-dogs.png",300,300,false],"list":["https:\/\/fendaf.ee\/wp-content\/uploads\/2022\/08\/Cancer-as-a-cause-of-death-in-dogs.png",300,300,false],"medium":["https:\/\/fendaf.ee\/wp-content\/uploads\/2022\/08\/Cancer-as-a-cause-of-death-in-dogs.png",300,300,false],"full":["https:\/\/fendaf.ee\/wp-content\/uploads\/2022\/08\/Cancer-as-a-cause-of-death-in-dogs.png",300,300,false]},"yoast_head":"\nTomatoes and lycopene<\/h3>\n
Turmeric and curcumin<\/h3>\n
Medicinal mushrooms: more than a supplement?<\/h3>\n
How much extra food should a dog receive?<\/h2>\n
Does a lack of proof mean it is not worth trying?<\/h2>\n
What does canine cancer mortality data really tell us?<\/h2>\n
Sources<\/h2>\n
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