Cancer is the leading cause of death in dogs over 10 years old. Understanding welfare considerations across the cancer journey helps owners make decisions that prioritize their dog's quality of life.
Cancer welfare in dogs requires honest, individualized assessment of what treatment can realistically achieve for each patient. Lymphoma chemotherapy typically produces good quality of life remissions for 6-18 months — dogs on chemotherapy protocols generally live their normal lives with manageable side effects. Osteosarcoma presents a more complex welfare picture: the bone pain is severe and unremitting without intervention; amputation followed by chemotherapy is the standard treatment but requires significant recovery; limb-sparing surgery is possible for some; palliative analgesia alone controls pain for limited periods. Hemangiosarcoma has a poor prognosis even with treatment. Quality of life scoring throughout treatment is essential — dogs that stop enjoying food, play, and social interaction, or that show constant pain, are telling us something that must be heard. Euthanasia before suffering becomes irresolvable is a welfare gift.