The fisher is a mid-sized forest carnivore that has been reintroduced to parts of its former range in the Pacific Northwest and northeast US, with welfare considerations central to reintroduction program design.
Fisher reintroduction welfare encompasses both the translocation event and the long-term welfare of established populations. Capture, health assessment, transport, and release involves acute stress that is minimized through experienced handling and appropriate pre-release conditioning. Released fishers face the challenge of establishing territories in unfamiliar landscapes — a period of heightened vulnerability and welfare risk. Anticoagulant rodenticide exposure from prey that have consumed rat poison causes internal hemorrhaging — a prolonged and painful death. This threat is particularly acute where cannabis cultivation uses rodenticides in remote forest areas. Long-term population welfare requires old-growth forest protection to maintain the denning habitat that female fishers require. Reintroduction success is the combined outcome of translocation welfare, habitat quality, and ongoing threat management.