American mink escaped from fur farms and established as highly damaging invasive predators in Europe, creating a welfare dilemma between individual mink welfare and the survival of native water voles and waterfowl.
American mink represent one of the clearest invasive species welfare dilemmas: individual mink are sentient animals capable of suffering, but their presence causes ongoing suffering and population collapse in prey species. The welfare of mink in lethal control programmes must be minimised through humane, certified kill traps with appropriate checking frequency. Non-lethal alternatives are currently impractical at scale. The net welfare calculation — preventing ongoing water vole and ground-nesting bird suffering and mortality — generally supports control, but the obligation to minimise mink suffering in that process remains.