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. Certain breeds have been found to have higher incidences of specific cancers due to genetic predispositions passed down through generations of selective breeding.
Regardless of the specific diagnosis, early detection is key for providing effective treatment options for pets battling this serious illness. Pet owners should be vigilant in monitoring their dog’s health and behavior, looking out for any unusual lumps, bumps, or changes in appetite, energy level or bathroom habits that could be early warning signs of cancer. Regular check-ups with a veterinarian are also critical for catching cancer in its earliest, most treatable stages.
Here are The 15 Dog Breeds With The Highest Cancer Rates. While all dogs have some level of cancer risk, understanding which breeds are predisposed can help owners take proactive steps in prevention and early detection. With greater awareness, more research funding, and advances in veterinary oncology, there is hope that cancer rates in dogs can start to decline in the years ahead. In the meantime, extra TLC and attentiveness to your canine companion’s health is the best medicine.
14Scottish 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. This puts them at significant risk of developing malignant tumors at some point during their lifetime.
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. One potential factor is the inbreeding that was historically done to maintain the Scottie’s distinct appearance, which may have inadvertently increased expression of cancer-causing genes.
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. Bladder cancer is another type that Scotties have higher rates of compared to other breeds. Catching these cancers early is critical for the best treatment outcomes, so owners need to be alert to any growing lumps or bumps, unexplained weight loss, persistent lameness or changes in appetite or energy.
To help combat the high cancer rates in Scottish Terriers, owners can take proactive steps such as feeding a healthy diet, avoiding obesity, limiting exposure to lawn chemicals and pesticides, and most importantly, scheduling regular check-ups with a veterinarian. Reputable breeders are also working to reduce the incidence of cancer by screening their breeding stock and carefully selecting mating pairs. With increased awareness, preventive care and ongoing research, the goal is to see cancer rates start to decline in this spirited and beloved breed. Scottish Terrier owners should be empowered with the knowledge to help keep their dogs as healthy as possible for many years to come.