Wildlife Poisoning: Rat Bait and Snail Pellet Impacts

Rodenticides and garden pesticides cause widespread secondary poisoning in wildlife including hedgehogs, birds of prey, and foxes; safer alternatives exist for most applications.

Key Facts

Brodifacoum rodenticides have been detected in over 90% of barn owls tested in some UK studies
Garden slug pellets containing metaldehyde or methiocarb are acutely toxic to hedgehogs, birds, and dogs
Ferric phosphate slug pellets are effective and safe for wildlife including pets
Rodent control through exclusion (proofing buildings) prevents the need for toxic rodenticides in many situations
Secondary poisoning chains extend to raptors and foxes that eat poisoned rodents

Welfare Considerations

Garden and agricultural poisons create a diffuse, largely invisible welfare harm across wildlife populations. Animals that consume poisoned prey or bait typically die slowly from anticoagulant poisoning or neurological damage, suffering for hours to days. The indirect nature of secondary poisoning - a raptor eating a rodent that consumed anticoagulant bait set for another species - means the harm is unintentional but no less real. Transitioning to exclusion-first rodent management and wildlife-safe alternatives for garden pest control would eliminate most of this welfare harm with minimal reduction in pest control effectiveness.

What You Can Do

Never use second-generation anticoagulant rodenticides; use exclusion or snap traps instead
Replace metaldehyde slug pellets with ferric phosphate alternatives immediately
Store all garden chemicals securely to prevent wildlife access
Report suspected wildlife poisoning to wildlife crime officers
Support campaigns for mandatory restrictions on the most wildlife-damaging pesticides