Invertebrates

Snail and Slug Welfare in Pest Control

Metaldehyde slug pellets and other molluscicides cause prolonged suffering in target gastropods and secondary poisoning of hedgehogs, birds, and other wildlife.

Key Facts

Metaldehyde causes excessive mucus production and convulsions in slugs and snails before death
Poisoned slugs are consumed by hedgehogs, thrushes, and ground beetles causing secondary poisoning
The EU banned metaldehyde use in agricultural settings in 2020 following environmental review
Ferric phosphate alternatives are considered less harmful but effectiveness is debated
Barrier methods, copper tape, and predator attraction provide non-lethal pest management alternatives

Welfare Considerations

Snail and slug sentience is uncertain but metaldehyde death involves observable physiological distress over extended periods, arguing for the precautionary application of welfare principles. The secondary poisoning of hedgehogs, birds, and other wildlife from consuming poisoned slugs causes more certain welfare harm. Ferric phosphate alternatives and non-chemical controls reduce welfare risks across the food chain.

What You Can Do

Switch from metaldehyde to ferric phosphate or non-chemical slug control methods
Create habitat for natural predators including hedgehogs, frogs, and ground beetles
Use physical barriers rather than chemical controls where feasible in your garden
Advocate for complete phase-out of metaldehyde products from garden retail
Learn about integrated pest management approaches that minimize molluscicide use