Dog Cancer Welfare and Palliative Care

Cancer is a leading cause of death in older dogs — welfare-focused oncology balances treatment burden against quality of life, with palliative and hospice care essential tools.

Key Facts

Cancer affects approximately 50% of dogs over 10 years old and is responsible for about 47% of disease-related deaths in older dogs.
Common canine cancers include lymphoma, osteosarcoma, mast cell tumours, and haemangiosarcoma.
Osteosarcoma causes severe bone pain — pain management is a critical welfare priority from diagnosis.
Chemotherapy in dogs typically uses lower doses than human cancer treatment, producing acceptable side effects while maintaining quality of life.
Quality of life assessment tools (e.g. the HHHHHMM scale) help owners and vets make end-of-life decisions based on welfare.

Welfare Considerations

Canine cancer welfare requires placing quality of life at the centre of every treatment decision. Unlike human oncology, where aggressive treatment to extend life at significant cost is often the goal, veterinary oncology is guided by the principle that treatment benefit must exceed treatment burden. A dog receiving chemotherapy should maintain good appetite, social engagement, and pain-free living. When treatment can no longer maintain quality of life, palliative and hospice care — and ultimately euthanasia — represent the most humane welfare choices available.

What You Can Do

Work with a veterinary oncologist who discusses quality of life alongside treatment options for cancer diagnosis.
Use validated quality of life tools regularly to assess your dog's wellbeing throughout cancer treatment.
Prioritise pain management from diagnosis — osteosarcoma and other painful cancers require aggressive analgesia.
Discuss palliative and hospice care options with your vet when curative treatment is no longer achievable or appropriate.