As the days grow shorter and the air turns crisp, rodents start looking for warm, cozy places to hide, often in your home. And while it might be tempting to sprinkle rodenticide around the house or yard, these baits are not just dangerous to rodents; they’re extremely toxic to your pets, too.

Year after year, rodenticides make the ASPCA’s Top 10 Pet Toxins list. The very ingredients that lure in mice and rats can have the same deadly effect on dogs and cats, causing internal bleeding, kidney failure, seizures, or even death.

For dog owners, there’s an extra twist: some breeds, like terriers and other natural ratters, are hardwired to seek out rodents. That curiosity can put them at higher risk of encountering and eating rodents that have ingested rodenticide. So if your pup has a nose for hunting, you’ll want to pay extra attention this season.

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The Different Types of Rodenticides and Their Risks

1. Anticoagulants:
These are the most common rodenticides, causing internal bleeding within 3–5 days. If your pet eats one, prompt veterinary care is critical, ideally within 60–72 hours.

2. Bromethalin:
This bait attacks the nervous system, leading to weakness, tremors, or seizures. Immediate treatment at a veterinary clinic is essential.

3. Cholecalciferol (Vitamin D3):
Highly concentrated, this rodenticide can cause kidney damage and calcification of soft tissues like the heart and blood vessels. Quick action is vital to prevent serious harm.

4. Corn Gluten:
Often sold in disc or pellet form, corn gluten can upset your dog’s stomach. Large amounts may cause dehydration or intestinal blockages. Don’t assume all brown pellets are safe!

5. Zinc Phosphide:
Used mainly for gophers and moles, zinc phosphide creates toxic phosphine gas in the stomach, causing vomiting, tremors, and organ damage. Humans can be affected if they come into contact with vomit, so caution is key.

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What to Do If Your Pet Eats Rodenticide

• Keep the packaging or receipt: This helps your vet know exactly what your pet ingested.
• Call the ASPCA Animal Poison Control Center at (888) 426-4435 or go straight to your veterinarian.
• Document bait placement: Note where and how much rodenticide you placed, and check it regularly to make sure pets haven’t moved it.

Even the most careful home can hide rodenticide dangers. If your dog is a terrier, ratting breed, or naturally curious about small critters, extra vigilance is essential. Rodent bait is effective, but your furry friend’s safety comes first.

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