Stoats and weasels are important ecosystem predators whose welfare is affected by rodenticide poisoning, trapping for game management, and habitat loss. Their conservation is tied to prey availability and predator-prey balance.
Stoat and weasel welfare involves genuine conservation conflicts. In the UK they are native predators whose welfare deserves protection; in New Zealand they are invasive aliens whose eradication protects endemic bird welfare. Trapping methods used for control must meet welfare standards — pole traps cause severe suffering through prolonged leg entrapment and are illegal. Spring traps approved to welfare standards should kill instantly; poorly maintained or improperly set traps fail this standard. Secondary poisoning from rodenticides causes internal hemorrhaging and slow death. Welfare standards in predator control are achievable and legally required in many jurisdictions.