Dog Cancer: Welfare Through Diagnosis and Treatment

Cancer is a leading cause of death in older dogs, and welfare-focused oncology requires balancing treatment benefit against quality of life impacts.

Key Facts

Cancer is responsible for approximately 50% of deaths in dogs over the age of 10 in Western countries
Lymphoma, osteosarcoma, mast cell tumours, and haemangiosarcoma are among the most common canine malignancies
Veterinary oncology has advanced significantly — chemotherapy in dogs aims at quality of life preservation rather than cure
Dogs typically tolerate chemotherapy better than humans — significant side effects occur in fewer than 5% of cases
Palliative care including pain management, nutritional support, and quality of life monitoring is an integral part of cancer management

Welfare Considerations

Cancer diagnosis does not automatically mean poor quality of life. Many dogs with cancer continue to experience pleasure, social interaction, and physical activity for significant periods with appropriate treatment. Welfare-focused oncology decisions require honest assessment of treatment burden versus benefit, consideration of the dog's experience throughout treatment, and proactive quality of life monitoring to identify the point at which comfort care alone is more appropriate.

What You Can Do

Seek consultation with a board-certified veterinary oncologist for dogs diagnosed with cancer to understand all treatment options
Use a daily quality of life log to track your dog's experience throughout cancer treatment or management
Discuss palliative care and pain management proactively — comfort should be maintained regardless of treatment choice
Make end-of-life decisions based on your dog's daily experience rather than survival duration alone