Warfarin Rodenticide and Pets
Find out if Warfarin Rodenticide is toxic to dogs and cats.
Think your pet ate something toxic?
Call ASPCA Animal Poison Control Center: (888) 426-4435 or view emergency guide
Warfarin rodenticides are extremely dangerous to dogs and cats. As a first-generation anticoagulant, warfarin interferes with the body’s ability to recycle vitamin K, which is essential for normal blood clotting. Pets may not show any signs of illness for one to three days after ingestion, but internal bleeding can begin much sooner.
Exposure usually happens when a dog or cat eats bait pellets, blocks, or powder directly from a bait station or a spilled container. Cats can also be poisoned secondarily by eating rodents that have consumed warfarin. Because the signs are delayed, many pet owners do not realize their animal has been exposed until the poisoning has become severe.
If you suspect your pet has eaten warfarin or any rodenticide, treat it as an emergency and call a veterinarian or a pet poison control center immediately. Early treatment with vitamin K1 and, in severe cases, blood transfusions or plasma, can be lifesaving. Do not attempt to induce vomiting unless a professional specifically tells you to do so.
To prevent poisoning, avoid using warfarin-based baits in homes with pets. Keep all rodenticides in locked cabinets and place tamper-resistant bait stations only in areas completely inaccessible to animals. Consider safer alternatives such as mechanical traps or professional pest control services that use pet-safe methods.
Is Warfarin Rodenticide Toxic to Dogs?
Even small amounts can cause life-threatening internal bleeding 1–3 days after ingestion.
Is Warfarin Rodenticide Toxic to Cats?
Highly toxic; secondary poisoning is also possible if a cat eats a poisoned rodent.
Active Ingredients
- warfarin
Pest Targeted
- rodents
Formulation
bait pellets, blocks, powders, liquid baits
Signal Word
caution
Application Area
indoor and outdoor use, including basements, attics, garages, and along building perimeters
EPA Registration Number
EPA Reg. No. varies by product
Symptoms to Watch For
- lethargy
- weakness
- pale gums
- bruising
- blood in urine or stool
- nosebleeds
- bleeding gums
- coughing or difficulty breathing
- swollen joints
- collapse
What If My Pet Was Exposed to Warfarin Rodenticide?
Contact a veterinarian or pet poison helpline immediately. Do not wait for symptoms to appear. Do not induce vomiting unless instructed by a professional. Bring the product packaging if possible.
Sources
Vet's Note
PetPilot provides general information for educational purposes. While we reference authoritative veterinary organizations, this page has not been individually reviewed by a veterinarian for your specific pet. Individual animals may react differently based on age, weight, breed, health conditions, and amount consumed. Always consult your veterinarian or a poison control center for personalized advice, especially if your pet is ill, injured, pregnant, nursing, or on medication.