Pest control chemicals including rodenticides and lead ammunition cause significant welfare harm to non-target wildlife. Understanding these harms helps identify alternatives that reduce wildlife suffering.
Wildlife poisoning from pest control chemicals represents a diffuse, chronic welfare harm that is largely invisible compared to acute wildlife crises. Rodenticide poisoning causes prolonged anticoagulant haemorrhage — affected animals may bleed internally for days before death, during which they are debilitated and vulnerable to predation. Owls and raptors accumulate rodenticide through eating affected prey, creating a secondary poisoning pathway that affects predators at the top of the food chain. Lead poisoning from ammunition causes progressive neurological damage in scavenging birds — condors, eagles, and kites — that is debilitating and fatal if the toxic load is high enough. The welfare case for transitioning to non-toxic alternatives in both contexts is strong, and the alternatives are available and technically adequate.