Cancer is a leading cause of death in older dogs. Balancing treatment benefits against welfare costs requires compassionate veterinary partnership and quality-of-life assessment.
Cancer treatment in dogs raises complex welfare trade-offs between extending life and minimizing suffering during treatment. Chemotherapy in dogs is generally better tolerated than in humans because doses are calibrated for quality of life rather than cure. Surgery for solid tumors can be curative with minimal welfare impact. The welfare-centered approach requires honest assessment of treatment burden versus benefit, transparent owner communication, and regular quality-of-life monitoring. Euthanasia before significant suffering begins — rather than after — is often the most welfare-positive decision in terminal cancer cases.