Cancer is the leading cause of death in adult dogs and a significant cause in cats — welfare-conscious treatment decisions balance quality of life with life extension.
Companion animal cancer welfare involves the welfare impact of both the disease and the treatment. Aggressive treatment can extend life but may compromise quality of life through side effects, frequent vet visits, and stress. Palliative approaches that prioritize comfort and dignity are an equally valid welfare choice. Veterinary oncology has advanced rapidly, and treatment outcomes for many cancers are significantly better than a decade ago. The welfare-centered question is always: what treatment path best serves the animal quality of life and minimizes suffering while respecting owner values and resources.