One of the most challenging diagnoses we might face is hearing that our beloved dog or cat has cancer. Like humans, pets are susceptible to various types of cancer, and catching it early can make a significant difference in their treatment options and quality of life. While the thought of cancer is frightening, being aware of the common signs and symptoms can empower you to act quickly and get the best care for your furry friend. 

In this article, we’ll cover the warning signs of cancer in pets, types of cancers seen in dogs and cats, and what you can expect when seeking treatment.

Common Warning Signs of Cancer in Pets

Spotting cancer early in pets can greatly improve treatment options and outcomes. While some symptoms may seem minor, they could be signs of a serious condition. From unusual lumps to changes in appetite or energy levels, knowing what to watch for can make all the difference. In this article, we’ll cover the key warning signs of cancer in pets to help you take quick action if needed.

  1. Lumps and Bumps

Lumps or bumps on your pet’s body may indicate cancer, though not all are cancerous. Regularly check for any new or changing growths during grooming or petting sessions. Early detection through veterinary examination is key, especially for lumps that grow, change in texture, or persist.

  1. Unexplained Weight Loss

Sudden, unintentional weight loss can signal cancer, even if your pet is eating normally. Cancer may alter metabolism or disrupt organ function, leading to weight loss. Any significant weight change should prompt a visit to the vet for further evaluation.

  1. Lethargy and Loss of Energy

Persistent lethargy, reduced energy, or disinterest in usual activities can be an early sign of cancer. Chronic fatigue may result from the body’s response to cancer, such as anemia or overall immune stress.

  1. Persistent Sores or Wounds

Sores that do not heal, particularly those lasting for weeks, may indicate cancer. These wounds may appear as ulcers or sores that bleed or discharge fluid. It’s important to consult a vet if any sore persists beyond a normal healing period.

  1. Changes in Appetite

Sudden changes in your pet’s appetite, whether an increase or decrease, can be a sign of cancer. Digestive issues or discomfort caused by tumors may lead to reduced food intake, while some cancers may increase hunger. Any significant change in eating habits should be discussed with a vet.

  1. Difficulty Breathing or Coughing

Respiratory issues, such as difficulty breathing or a persistent cough, may indicate lung cancer or tumors pressing on the lungs or throat. If your pet struggles to breathe or has a chronic cough that doesn’t improve, seek veterinary advice promptly.

  1. Vomiting and Diarrhea

Chronic vomiting or diarrhea can be a symptom of cancer in the stomach or intestines. If these digestive issues persist for several days or recur frequently, they should be investigated by a vet to rule out cancer or other gastrointestinal problems.

  1. Abnormal Discharge

Unusual discharge from the eyes, nose, or mouth could be a sign of cancer, such as nasal or oral tumors. Bloody or persistent discharge, especially with other symptoms like sneezing or swelling, warrants immediate veterinary attention to identify potential cancer or other serious conditions.

Types of Cancer in Dogs and Cats

Cancer can affect both dogs and cats, and knowing the common types is key to early detection and treatment. In this section, we’ll highlight the most common cancers in pets and the symptoms to watch for, helping you act quickly if needed.

  • Lymphoma: Lymphoma is a common cancer in both dogs and cats, affecting the lymph nodes and potentially spreading to organs like the liver and spleen. Symptoms include swollen lymph nodes, weight loss, lethargy, and difficulty breathing. Early treatment, such as chemotherapy, can help manage the disease and improve quality of life.
  • Mast Cell Tumors: Mast cell tumors are a type of skin cancer frequently found in dogs and sometimes in cats. These tumors can be benign or malignant, appearing as small lumps that may grow quickly or remain slow-growing. Early detection is key, and treatment often involves surgery, with chemotherapy or radiation in more aggressive cases.
  • Osteosarcoma: Osteosarcoma is a bone cancer commonly seen in larger dog breeds. It usually affects the long bones in the legs, causing lameness, pain, and swelling. This aggressive cancer spreads rapidly, making early diagnosis vital. Treatment often includes limb amputation and chemotherapy, which can help extend the dog’s life.
  • Squamous Cell Carcinoma: Squamous cell carcinoma is a skin cancer more prevalent in cats, especially those exposed to sunlight. It causes sores or ulcers on areas like the ears and nose. In dogs, it can also affect the mouth and nails. Early detection and treatment, typically involving surgery, can prevent the cancer from spreading.

Diagnosis and Treatment Options

When your pet shows signs of cancer, early diagnosis and treatment are critical. Veterinarians will likely use diagnostic tools such as blood tests, X-rays, biopsies, and imaging scans to confirm the presence of cancer. Once diagnosed, the treatment plan depends on the cancer type and stage. 

When to See a Vet

If your pet shows any signs of cancer, it’s important to bring your pet to see our veterinary team right away. Early detection allows for more treatment options and improves the chances of a positive outcome. Waiting for symptoms to resolve on their own can result in more advanced cancer, which is harder to treat. Even minor signs like a small lump or occasional lethargy should be checked by a vet. Regular check-ups are essential, especially for older pets or breeds prone to cancer, as they can help catch early signs before symptoms worsen.

Seek urgent veterinary care if your pet has a rapidly growing lump, difficulty breathing, persistent vomiting, severe lethargy, or wounds that won’t heal. Always communicate any changes in your pet’s behavior or appearance to your vet, who can help guide the next steps. Ultimately, your pet’s quality of life is the priority, and your vet will work with you to develop a treatment plan that ensures your pet stays comfortable and well cared for.

Keep an Eye on Your Pet’s Health

Being aware of the early warning signs of cancer can make a huge difference in your pet’s health. Regular check-ups, monitoring for unusual symptoms, and early intervention are all key in ensuring your pet lives a happy, healthy life. If you notice any lumps, bumps, or other concerning signs, don’t hesitate to call us to talk to our veterinary team. The sooner you act, the better the chances of successful treatment.

FAQs About Cancer in Pets

  1. Can pets survive cancer? 

Yes, many pets can survive cancer, especially if it is caught early and treated appropriately. With advances in veterinary oncology, treatments like surgery, chemotherapy, and radiation can offer hope and improve quality of life for many pets.

  1. What is the most common cancer in dogs and cats? 

Lymphoma is one of the most common cancers found in both dogs and cats. Mast cell tumors are also prevalent in dogs, while squamous cell carcinoma is more frequently seen in cats.

  1. How can I improve my pet’s quality of life if they have cancer? 

Focus on your pet’s comfort by providing a calm environment, ensuring they have a nutritious diet, and managing pain with medications recommended by your vet. Regular vet check-ups are also important to monitor your pet’s condition and adjust treatment as needed.

  1. Is chemotherapy safe for pets? 

Yes, chemotherapy can be safe for pets and is often well-tolerated. While some side effects may occur, such as fatigue or mild gastrointestinal upset, the treatment can help shrink tumors and extend your pet’s life with minimal discomfort.

  1. Should I bring my pet to a specialist? 

In some cases, we will refer you to a veterinary oncologist, a specialist trained to treat cancers in pets. Oncologists can provide more advanced treatment options, such as specialized surgeries and radiation therapy.