Veterinary oncology advances including immunotherapy, targeted therapy, and stereotactic radiation are improving cancer outcomes for dogs while raising important quality of life questions.
Advanced veterinary oncology raises welfare questions that parallel human oncology ethics: when does treatment intensification improve quality of life versus reduce it, and how should survival time be weighed against treatment-related suffering? Dogs in cancer treatment experience adverse effects from chemotherapy, radiation, and targeted therapy that must be weighed against the welfare benefit of disease control and extended survival. Owners who pursue the most intensive treatment options available do so from love, but welfare-centered oncology acknowledges that the goal is quality survival, not survival at any cost. Palliative intent — maximizing comfort and quality of life without curative intent — is an appropriate goal for many dogs with advanced cancer. Veterinary oncologists who discuss these distinctions explicitly and involve owners in genuinely informed decisions provide care that honors both the dog and the owner relationship.