Dogs have extraordinary olfactory abilities that enable them to detect certain cancers, creating research opportunities with welfare implications for both species.
Cancer detection dogs occupy an interesting position — working animals whose labour contributes directly to human welfare while their own welfare depends entirely on training ethics and working conditions. Welfare-centred cancer detection programmes use positive reinforcement training exclusively, provide appropriate rest between working sessions, monitor dogs for stress indicators, and plan for dignified retirement. Dogs used in long-term research programmes form strong bonds with handlers — disrupting these relationships during transitions between handlers or at retirement must be managed carefully. The extraordinary contribution these dogs make to human welfare makes investment in their own welfare both ethically obligatory and practically important for sustained performance.