Cancer is the leading cause of death in adult dogs, and navigating treatment decisions requires balancing welfare, quality of life, and owner values.
Dog cancer welfare centers on the quality of life principle — the goal is not simply extending life but maintaining dignity and freedom from suffering throughout whatever life remains. This requires honest assessment of treatment side effects, the dog's individual temperament and stress responses to veterinary procedures, and realistic evaluation of prognosis. Veterinary oncologists are trained to support these conversations. Palliative care, including pain management, nutritional support, and comfort measures, can be as welfare-positive as aggressive curative treatment in the right circumstances. Owners should feel supported in choosing quality over quantity of life without guilt when that is the welfare-appropriate decision.