Rodenticides - BC SPCA
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Rodenticides

For too long poisons have been the default strategy to manage rodent problems – but thankfully the risks and effectiveness of alternatives are being increasingly recognized. Rodenticide bait is made to smell like food to attract rodents, but its odour and flavour attracts many types of animals, putting them at risk of direct poisoning.

Rodent poisons or rodenticides come in different forms and fall into one of three categories: non-anticoagulants (e.g. corn cellulose, bromethalin, zinc phosphide) “First-Generation” anticoagulants (e.g., chlorophacinone, diphacinone, warfarin) or “Second-Generation” anticoagulants (e.g., brodifacoum, bromadiolone, difethialone). As of July 21, 2021, Second-Generation anticoagulant rodenticides (SGARs), are banned for sale and use in residential (PDF) and non-essential commercial (PDF) settings in the province. Exemptions are allowed for designated essential services and agricultural operators.

Anticoagulant rodenticides are the most commonly used in Canada. These rodenticides thin the blood and prevent it from clotting, causing internal bleeding which results in a slow and painful death. Poisoned rodents, and the animals who become poisoned by eating their carcasses, slowly bleed out over hours, days or even weeks.

Rodenticides are also dangerous for owls, eagles, raccoons, cougars and even cats and dogs. Rat poisoning is injuring our local wildlife. Every year, hundreds of domestic and wild animals receive emergency medical care to combat the deadly effects of secondary poisoning from eating rodents killed by rodenticide, and unknown numbers of others suffer painful deaths.

Northern Pygmy owl with Rodent. Photo credit: Geoffrey Sheun

How to help

You can help rodents and other wildlife by avoiding poisons as much as possible, and encouraging your friends, family and community to make changes as well.

Rodent control methods to avoid

Learn more about humane rodent control: