Cancer is common in older dogs. Welfare-centered approaches to canine oncology focus on maintaining quality of life through treatment rather than maximizing survival time at any cost.
Canine oncology increasingly recognizes that treatment goals must include quality of life alongside survival time or remission. A dog in chemotherapy-induced nausea and lethargy with poor quality of life has not benefited from treatment that extends his days if those days are characterized by suffering. Modern veterinary oncology protocols are calibrated differently from human cancer treatment — dogs are dosed at levels that typically maintain quality of life, making side effects less severe. Pain management in cancer, particularly for osteosarcoma, is a major welfare priority: bone cancer pain is intense and requires aggressive analgesic management including opioids and other modalities. Honest quality of life assessment throughout treatment helps owners and veterinarians make decisions that serve the dog welfare rather than owner wishes alone.