15 Dog Breeds With The Highest Cancer Rates

Cancer is a devastating condition that affects millions of people each year. Unfortunately, it can also affect our beloved canine companions. Recent research indicates that cancer rates in dogs are on the rise, with one in four dogs developing some form of cancer during their lifetime. This growing trend has led to increased awareness and concern among pet owners who want to ensure the health and wellbeing of their furry family members.

The types of cancers seen most frequently in dogs vary depending on breed and age, with bone cancer being particularly common in large-breed dogs while lymphoma is more commonly found in small-breed dogs over 10 years old. Other forms of cancer such as mast cell tumors or melanomas may also be diagnosed at any age or breed type.

Regardless of the specific diagnosis, early detection is key for providing effective treatment options for pets battling this serious illness. Here are The 15 Dog Breeds With The Highest Cancer Rates.

Saint Bernards

Recent studies have shown that cancer rates in Saint Bernards are on the rise, and this is a cause for concern. This breed of dog has long been known to be prone to certain types of cancers, but the increase in cases over recent years has sparked alarm among veterinarians and pet owners alike.

The reasons behind the rising incidence of cancer in Saint Bernards remain unclear, though some theories suggest that environmental factors may play a role. Whatever the underlying causes may be, it is clear that more research needs to be done into this issue so as to better understand why these dogs are at such high risk for developing tumors and other forms of cancer.

One possible explanation for why Saint Bernards are particularly vulnerable to cancer could lie with their genetics. This breed is bred from two lines which were closely related; one line was descended from mastiffs while another line was descended from Great Danes.

As both breeds carry certain genetic predispositions towards various diseases and disorders due to their close relationship, it stands to reason that these inherited traits would also manifest themselves in Saint Bernard puppies as they mature into adulthood. Furthermore, since many common cancers occur when genes mutate or become damaged during cell division processes.


Weimaraners are beautiful, intelligent hunting dogs that have become increasingly popular as family pets. Unfortunately, these majestic animals face a unique health risk: an unusually high rate of cancer in their breed. Weimaraners often develop cancers at much younger ages than other breeds and the cause is not yet known.

The most common form of cancer found in Weimaraners is lymphoma, which affects the cells responsible for fighting infection and disease. It’s estimated that up to 40% of all deaths among Weimaraner dogs are due to some form of cancer. In fact, researchers believe this could be one of the highest rates in any dog breed. Other forms of cancer prevalent in Weimaraners include osteosarcoma (bone tumor), hemangiosarcoma (tumor arising from blood vessels) and mast cell tumors (skin tumor).

It’s still not clear what causes such high rates of cancer among Weimaraners but there are several theories being studied by scientists. One theory suggests a genetic mutation might be responsible for making them more susceptible to developing certain types of tumors or cancers earlier on in life.

Scottish Terriers

Scottish Terriers, also known as Scotties, are a small breed of dog that have been popular since the 19th century. They are an active and independent breed, with a unique double coat and distinctive facial features. But beneath their charming exterior is a serious health issue: Scottish Terriers have one of the highest cancer rates among all breeds of dogs.

Cancer is the leading cause of death in Scottish Terriers, accounting for nearly half of all deaths in the breed. This is significantly higher than other small-breed dogs like Chihuahuas or Yorkies which typically only see around 25% mortality from cancer. While researchers can’t pinpoint exactly why this might be, there are some theories about genetic predisposition or environmental factors that could be at play.

The most common types of cancer seen in Scottish Terriers include lymphoma, mast cell tumors, hemangiosarcoma (cancer of blood vessels), osteosarcoma (bone cancer) and skin tumors such as melanomas and sebaceous adenomas.

Nova Scotia Duck Tolling Retrievers

Nova Scotia Duck Tolling Retrievers are an active and intelligent breed of dog, known for their hunting skills. They are also known as the “Toller” or “Little River Duck Dog”, and they have become a popular companion dog in recent years. Unfortunately, they have one of the highest rates of cancer among breeds within the canine family.

The most common form of cancer found in Nova Scotia Duck Tolling Retrievers is hemangiosarcoma, which develops in the endothelial cells that line blood vessels. This type of cancer is aggressive and spreads quickly throughout a dog’s body if not caught early enough.

Other forms of cancer found in this breed include lymphoma, mast cell tumors, osteosarcoma (bone cancer), melanomas (skin cancers), and mammary gland tumors. These types can all be treated with surgery or chemotherapy depending on how far along it has progressed when diagnosed by a veterinarian.

While research into why certain breeds suffer from higher rates of cancer than others remains ongoing, there are some theories about why Nova Scotia Duck Tolling Retrievers may be especially prone to developing these diseases due to genetic factors present within their


Dachshunds are one of the most beloved dog breeds in the world, thanks to their distinct look, loyal personalities and playful demeanor. Unfortunately, this breed is also prone to a variety of health problems, including cancer. Recent studies have shown that Dachshunds have a higher risk for certain types of cancers than other breeds.

In particular, research has found that Dachshunds are more likely to develop osteosarcoma (bone cancer), mast cell tumors and lymphoma compared to other dogs. The reason why these cancers occur more frequently in dachshunds is not yet clear but some experts believe it may be due to genetic factors or environmental exposures such as radiation exposure or dietary habits.

In addition to increasing the risk for certain types of cancers, dachshunds can also suffer from other health issues such as back problems due to their long spine and hip dysplasia which affects many small-breed dogs.

Miniature Schnauzers

Miniature Schnauzers are an incredibly popular breed of dog, with their cheerful personalities and intelligence. However, they also have a higher risk of developing certain cancers than other breeds.

This is due to the fact that Miniature Schnauzers have been bred for many generations, leading to genetic predispositions for certain types of cancer. Unfortunately, this means that Miniature Schnauzer owners should be aware of the potential risks and take steps to ensure early detection and treatment if necessary.

One type of cancer that affects Miniature Schnauzers more often than other breeds is mast cell tumors (MCTs). These tumors can occur anywhere on the body but typically appear as bumps or lumps under the skin around the head, neck and chest area. MCTs are usually malignant in nature and can spread quickly throughout the body if left untreated.

German Shepherd 

German Shepherds are one of the most popular breeds in the world. They’re known for their loyalty, intelligence, and courage. But sadly, German Shepherds also have a high rate of cancer. Studies show that over half of all German Shepherds will develop some form of cancer during their lifetime.

The causes behind this high rate are not entirely clear but there is evidence to suggest that genetics may play a role in predisposing some dogs to certain types of cancers. Additionally, environmental factors such as exposure to toxins or chemicals can increase the risk for developing certain cancers.

While it’s true that German Shepherds have an increased risk for cancer compared to other breeds, there are steps you can take to help reduce your dog’s chances of developing it.

One way is by making sure your dog gets regular exercise and eats a healthy diet with plenty of vitamins and minerals which helps support overall health and well-being.

Brittany Spaniel

Brittany Spaniels are a beloved breed of dog that has been popular with families for generations. Unfortunately, this breed is also prone to developing certain types of cancer. Studies have shown that the incidence rate of cancer in Brittany Spaniels is much higher than in other breeds and even higher than the average rate among all dogs.

This high incidence rate can be attributed to several factors. One factor is genetics; Brittany Spaniels possess specific genetic mutations which make them more likely to develop certain cancers such as lymphoma and hemangiosarcoma. Additionally, environmental factors may play a role as well; exposure to pollutants or toxins could increase the risk of developing cancer in these dogs.

Finally, lifestyle choices like diet and exercise can also influence the chances of getting cancer; if a dog does not get enough exercise or eats an unhealthy diet they are at greater risk for developing certain types of tumors and cancers.


Newfoundland dogs are a large, powerful breed of working dog. They have become increasingly popular in recent years as family pets due to their gentle nature and protective instincts. Unfortunately, they also face an unfortunate health issue: high rates of cancer. In fact, Newfoundland dogs have the highest rate of any canine breed for developing certain types of cancers such as lymphosarcoma, hemangiosarcoma, osteosarcoma and mast cell tumors.

The exact cause or causes for these increased cancer rates is unclear but there are some theories about why this may be occurring in Newfoundlands more than other breeds. One possible explanation is that the genetic makeup of these dogs makes them predisposed to developing certain forms of malignancies.

Another theory suggests that lifestyle factors could play a role; many Newfoundland owners feed their pets commercial pet foods which contain preservatives and additives linked to higher rates of cancer in animals. Finally, environmental toxins such as pesticides may be contributing to the problem by causing changes at the cellular level which increase susceptibility to carcinogens over time.

Irish Wolfhound

Irish Wolfhounds are a large breed of dog with a long history of being used for hunting and warfare. They are also known for their loyalty and intelligence, making them popular family pets. Unfortunately, Irish Wolfhounds have one of the highest rates of cancer among all breeds. Approximately 70% will develop some form of cancer in their lifetime, with half succumbing to it within 6 years.

The most common type is hemangiosarcoma, which is an aggressive form of cancer that typically affects the heart or spleen. Other cancers that affect this breed include lymphoma, osteosarcoma (bone cancer), mast cell tumors, brain tumors and more rare forms such as fibrosarcomas and histiocytic sarcomas. The causes behind these high rates remain largely unknown but may be due to genetic factors or environmental exposure to toxins like pesticides or pollution.

Cocker Spaniel

Cocker Spaniels are one of the most beloved breeds of dog in America. They’re known for their intelligence, loyalty, and good-natured temperaments. Unfortunately, this breed is also prone to a number of health issues including cancer. In fact, Cocker Spaniels have one of the highest rates of cancer among all breeds.

Cancer is a leading cause of death in Cocker Spaniels with approximately 40% being affected by some form of it throughout their lifetime. The most common type is lymphosarcoma which can affect any part of the body but commonly appears as masses or tumors on organs such as the spleen or liver.

Other types include mast cell tumors (MCTs) and hemangiosarcomas which are both quite aggressive forms that don’t respond well to treatments like chemotherapy or radiation therapy. Additionally, there has been an increase in cases involving osteosarcoma and bladder cancers seen more frequently in older dogs over 10 years old.

Great Dane

Great Danes are majestic and beloved dogs. But, unfortunately, they have one of the highest rates of cancer among all dog breeds. In fact, according to recent estimates, roughly half of all Great Danes will develop some form of cancer during their lifetime.

The exact cause for this high rate has yet to be determined but there are several factors that could contribute to it. One is the long life expectancy of Great Danes; since they live up to 8-10 years on average, they’re more likely than other breeds to contract age-related cancers such as lymphoma or osteosarcoma. Additionally, this breed is prone to genetic disorders like von Willebrand’s disease which can increase their risk for certain types of cancers.

Fortunately, medical advancements in veterinary care mean that early detection and treatment can significantly improve a dog’s prognosis if he does develop cancer. It’s important for owners to stay alert and monitor any potential signs or symptoms so that they can seek help immediately if needed.


Bulldogs are a beloved breed of dog, known for their gentle and friendly nature. Unfortunately, they also have one of the highest cancer rates among all breeds. Studies have shown that up to 60% of bulldogs may develop some form of cancer in their lifetime. While the exact cause is still largely unknown, there are several potential factors that could be contributing to this high rate.

One possible factor is genetics; certain gene mutations can increase an individual’s susceptibility to developing malignant tumors or other forms of cancer. This means that bulldogs with these genetic predispositions may be more likely to suffer from disease than those without them. In addition, environmental factors such as exposure to carcinogenic compounds or radiation could also play a role in increasing a bulldog’s risk for developing cancer.


Boxer dogs are a popular breed, known for their intelligence and playful nature. Unfortunately, Boxers also have one of the highest rates of cancer among dog breeds. In fact, studies suggest that as many as 60% of Boxers will develop some form of cancer in their lifetime.

The most common cancers found in Boxers include lymphoma and mast cell tumors. These types of cancer can be more difficult to treat than other forms due to the aggressive nature with which they spread throughout the body. Additionally, there is evidence that suggests certain environmental factors may increase a Boxer’s risk for developing cancer; these include exposure to pesticides or smoke from burning materials like wood or coal.


As one of the most popular dog breeds, Rottweilers have become a beloved companion for many families. Not only are they loyal and loving animals, but they are also incredibly strong and intelligent. Unfortunately, these dogs can be prone to certain health issues including cancer.

Cancer is one of the leading causes of death in Rottweilers, with some studies showing that up to 60% of all deaths in this breed may be due to cancerous tumors. The most common types of cancers seen in Rottweilers include osteosarcoma (bone cancer), lymphoma and mast cell tumors.

These cancers can affect any part of the body but are most commonly seen in the bones, skin or organs such as the lungs and spleen. Early detection is key when it comes to treating these types of cancers as treatment options like surgery or chemotherapy may not be available if caught too late.

Therefore, it’s important for owners to keep an eye out for any abnormal changes or lumps on their pet’s body so that early intervention can take place if needed.

Golden Retriever

Golden Retrievers are one of the most beloved breeds in the world, known for their playful and loyal personalities. However, this breed is also susceptible to a number of health issues, including cancer.

The lifetime risk of cancer for Golden Retrievers is an alarming 62 percent—the highest rate among all dog breeds. But what makes this breed so vulnerable? And what can owners do to help prevent or mitigate this disease?

The exact reasons why Golden Retrievers have such high rates of cancer are still unknown, but experts believe that it may be due to a combination of factors. For instance, they tend to live longer than other breeds; dogs over 8 years old have higher risks for certain types of cancers like lymphoma and hemangiosarcoma. Additionally, some studies suggest that there may be genetic components at play as well.

Fortunately, there are steps owners can take to reduce their pet’s risk for developing cancer. Regular visits with your veterinarian should include check-ups on things like weight management and vaccinations; both obesity and certain infections increase the chances for developing tumors later in life. Additionally, providing plenty of exercise opportunities helps keep them healthy overall—as does avoiding

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