Cancer is one of the leading causes of death in senior pets, but with early detection, preventive care, and informed decisions, you can give your dog or cat a longer, healthier life.
Cancer is one of the leading causes of death in senior pets, but with early detection, preventive care, and informed decisions, you can give your dog or cat a longer, healthier life.
Did you know that cancer is one of the leading causes of death in senior dogs? Around 45% of dogs over the age of 10 are affected by some form of cancer. While cancer is slightly less common in cats, it can be just as serious and often more difficult to detect.
At our clinic, we believe that informed pet owners make the best decisions for their companions. That’s why we’ve put together this guide to help you recognize the signs, understand the risks, and know how to prevent and treat cancer in pets.
Cancer in Dogs: Age Matters
As dogs get older, their risk of developing cancer increases significantly. Certain breeds, such as Golden Retrievers, Boxers, and Rottweilers, are genetically predisposed to the disease. The most common types of cancer in dogs include lymphoma, osteosarcoma (bone cancer), hemangiosarcoma, and mast cell tumors.
Unexplained weight loss, fatigue, or unusual lumps should always be checked by a veterinarian. The earlier the diagnosis, the better the chances of successful treatment.
Cancer in Cats: Subtle but Serious
Cats are experts at hiding signs of illness, which can delay the diagnosis of cancer. Lymphoma is the most frequent type, often associated with feline leukemia virus (FeLV). Other common cancers in cats include squamous cell carcinoma (often on the nose and ears) and mammary adenocarcinoma.
That’s why regular veterinary check-ups are crucial; even if your cat appears to be in perfect health.
Why Age Plays a Key Role
Just like in humans, aging in pets leads to a higher risk of genetic mutations and weakened immune systems. This makes cats and dogs over 10 years old especially vulnerable to developing cancer.
For senior pets, more frequent check-ups and age-appropriate screenings are recommended, especially for breeds with a known predisposition.
Prevention and Treatment: What You Can Do
Preventing cancer starts with a healthy lifestyle and attentive care. Here’s what you can do to help protect your pet:
- Provide a balanced diet
- Encourage regular exercise
- Schedule routine vet visits
- Monitor for any physical or behavioral changes
- If a cancer diagnosis is confirmed, there are several treatment options available, including surgery, chemotherapy, radiation therapy, and electrochemotherapy. The best treatment plan will depend on the type of cancer, the pet’s age, and their overall health.
Care with love, Act with Knowledge
Understanding cancer in pets empowers you to make timely, compassionate decisions. Through prevention, early detection, and tailored treatment, it’s possible to give your pet a better quality of life; and more time by your side.
FAQ’s
Will cancer treatment make my pet sick like in humans?
Not usually. Pets tend to tolerate cancer treatments better than humans. For example, chemotherapy in animals is typically less aggressive to minimize side effects. Most pets maintain a good quality of life during treatment.
How do I decide if treatment is the right choice for my pet?
This is a personal decision based on:
- The type and stage of cancer
- Your pet’s overall health and age
- Cost and practicality of treatment
- Expected outcomes and quality of life
- Your vet or veterinary oncologist will help you weigh all options and support your decision.
Can cancer in pets be prevented?
While not all cancers are preventable, you can reduce risks by:
- Spaying/neutering (reduces risk of mammary, testicular, and uterine cancers)
- Avoiding exposure to toxins (e.g., smoke, lawn chemicals)
- Feeding a balanced diet
- Keeping your pet at a healthy weight
- Regular veterinary check-ups for early detection
How can I support my pet if they are diagnosed with cancer?
- Follow the treatment plan provided by your vet
- Keep your pet comfortable and stress-free
- Monitor for changes in appetite, energy, or symptoms
- Offer lots of love, attention, and enrichment
- Ask your vet about pain management and supportive care
What are signs my pet might have cancer?
Common signs include:
- Unusual lumps or bumps
- Sudden weight loss
- Lethargy or decreased activity
- Changes in appetite
- Bleeding or discharge from body openings
- Difficulty breathing, urinating, or defecating
- Persistent lameness or stiffness
Note: These signs don’t always mean cancer, but they should be evaluated by a vet.
Will my pet lose hair during chemotherapy?
Hair loss (alopecia) in pets undergoing chemotherapy is much less common than it is in humans. Most dogs and cats tolerate chemotherapy very well and experience minimal to no hair loss.
However, certain breeds with continuously growing hair; such as Poodles, Schnauzers, Old English Sheepdogs, and some Terriers may experience some thinning or patchy hair loss. Whiskers and fur around the face may also fall out in some cases, especially in cats.
Good to know: Unlike in humans, complete baldness is rare in pets. Their fur often grows back after treatment, sometimes with a slightly different texture or color.
When will I know it is time to say goodbye?
This is a personal decision and there’s no correct decision, but the decision that is right for you.
Things to consider include:
- You pet’s quality of life;
- The cost of continuing care;
- The time you need to invest in the care of your pet;
- Your desires for the kind of life you want for your pet to live.
You can assess the quality of life by assessing your pet’s appetite, activity and energy levels, and daily rituals.
Some questions that you should consider:
- Do the good times out number the bad?
- Can my pet still do things that make him or her happy?
- How different is my pet now compared to before he or she was sick?
If your pet starts to have more bad days than good days, then it might be time to say goodbye.
Remember that your vet will be there to guide you on that decision.
Scientific References
- Withrow, S. J. et al. (2013). Small Animal Clinical Oncology. Elsevier.
- Vail, D. M. (2007). Feline lymphoma and leukemias. In: Withrow & MacEwen.
- Barboza, D. V. et al. (2019). Retrospective study of neoplasms in companion animals. Pubvet.
- Rafael (2019). The importance of early cancer detection in veterinary medicine.
