Cancer is the leading cause of death in dogs over age 10. Palliative and active treatment approaches can maintain good quality of life — but welfare-focused decision-making requires honest assessment of treatment burden versus benefit.
Cancer welfare in dogs requires separating treatment burden from treatment benefit in an honest, welfare-centred assessment. Osteosarcoma causes severe, progressive bone pain — analgesic management (NSAIDs, opioids, gabapentin, bisphosphonates) is the most urgent welfare intervention regardless of whether amputation or chemotherapy is pursued. Dogs undergoing chemotherapy typically tolerate treatment well at veterinary doses — most maintain appetite, activity, and engagement throughout. Palliative care without aggressive treatment is not abandonment — for many dogs, especially older individuals or those with metastatic disease, maximising comfortable time without the stress of repeated clinic visits provides better welfare than pursuing remission. Owners benefit from validated quality of life assessment tools that provide an objective framework for difficult decisions. The most important welfare principle in canine cancer care is honest, compassionate communication between vet and owner about what treatment can realistically achieve.