Managing invasive species to protect native wildlife raises complex welfare questions about the methods used to control animals that are not responsible for their introduction.
Invasive animals are not morally responsible for their introduction, yet they cause real harm to native species and ecosystems. The welfare dilemma is genuine: lethal control causes suffering to individual invasive animals in order to protect native species. Methods that cause slow death — drowning traps, poisons — cause greater suffering than shooting or cervical dislocation. Non-lethal methods like fertility control are preferable where feasible. Welfare-conscious invasive species management minimises individual suffering while achieving conservation goals.