Osteosarcoma is the most common bone tumour in dogs, causing severe pain and requiring compassionate palliative care or amputation to maintain quality of life in affected animals.
Osteosarcoma causes intense, escalating bone pain that is often described as one of the most painful conditions seen in veterinary practice. Dogs hide pain instinctively, meaning owners may underestimate severity until pathological fracture occurs. Effective multimodal analgesia is both an ethical imperative and a practical challenge — monotherapy is rarely sufficient. Amputation, while psychologically difficult for owners, is remarkably well-tolerated by most dogs and provides immediate pain relief; most three-legged dogs adapt well within weeks. The decision between curative-intent treatment, palliative management, and euthanasia requires honest veterinary guidance based on the individual dog's pain, mobility, and overall health. Quality of life, not duration, must be the central welfare consideration.