Cancer affects a large proportion of dogs and treatment decisions involve complex welfare considerations balancing potential benefit against treatment burden and quality of life.
Cancer diagnosis in dogs initiates a complex welfare decision-making process. Treatment may extend life but also imposes burdens — surgery, chemotherapy side effects, repeated veterinary visits — that affect daily quality of life. For owners, the emotional desire to treat must be balanced against honest assessment of what the animal experiences during treatment. Osteosarcoma without amputation involves severe, unmanageable bone pain, making palliative care without amputation ethically problematic. Palliative-only care focused on maximizing comfort is a welfare-respecting and compassionate choice for many cancers. Regular quality-of-life monitoring guides ongoing decisions throughout the treatment journey.