Cancer in Cats: What You Need to Know

Cancer in cats can be a concern for many pet owners, especially as cats get older. While it’s less common than in dogs, understanding what to look out for can help you act early and get your cat the right support.

What are the most common types of cancer in cats?

Some cancers appear more frequently in cats than others. These include:

• Lymphoma: A cancer of the lymphatic system, often found in the intestines, and sometimes linked to feline leukaemia virus (FeLV).
• Squamous Cell Carcinoma (SCC): This skin cancer typically affects the ears, nose and mouth, particularly in light-coloured cats with sun exposure.
• Mammary Tumours: More common in unspayed females, these growths are often malignant and should be checked early by a vet.

What are the signs of cancer in cats?

Cats tend to hide illness well, so watch closely for subtle changes that may indicate a problem:

• Unexpected weight loss
• Lumps or bumps that are new, change shape, or grow
• Changes in appetite or ongoing digestive issues
• Vomiting or diarrhoea that doesn’t improve
• Breathing difficulty or visible discomfort

If you notice any of these symptoms, speak to your vet as soon as possible.

What causes cancer in cats?

There isn’t always a clear cause, but certain risk factors may increase a cat’s chance of developing cancer.

• Older age increases the likelihood of many types of cancer.
• Cats infected with FeLV may be more vulnerable to lymphoma.
• Exposure to cigarette smoke and other toxins can be harmful over time.
• Hormonal factors also play a role, as spaying and neutering can reduce certain risks.
• Living in a chronically stressful environment may promote inflammation and hamper a cat’s immune system and its ability to fight off cancer cells.

How is cancer in cats treated?

Treatment depends on the type and stage of the cancer. Your vet will help guide you to the best approach for your cat’s situation.

• Options may include surgery, medication, radiotherapy or chemotherapy.
• Some cats benefit most from palliative care focused on comfort and quality of life.
• Keeping a calm home and sticking to familiar routines can help reduce stress.

How can I help prevent my cat from getting cancer?

While not all cancers can be prevented, some simple steps can support your cat’s long-term health:

• Schedule regular vet check-ups to catch issues early.
• Ask your vet whether your cat would benefit from the FeLV vaccine.
• Avoid exposure to second-hand smoke and harsh chemicals in the home.
• Provide a balanced, high-quality diet made with natural ingredients.
• Identify stresses in your cat’s life and create a calm, cosy environment with lots to do and explore, to give them plenty of choice and control.

A cancer diagnosis can feel overwhelming, but it starts with awareness. By learning the signs, staying attentive to changes in your cat’s behaviour, and working closely with your vet, you’re doing everything right to help support them.

Every cat is different, and so is every journey. Whether you’re seeking reassurance or supporting a cat through treatment, trusted advice and early action can make a big difference.

For more guidance on health, behaviour and everyday wellbeing, check out our blogs. Each one is aimed to help you support your cat at every stage of life.