Is rat poison toxic to cats?
Also called: rat poison, mouse poison, rodenticide, rat bait, mouse bait, brodifacoum, cholecalciferol, alphachloralose
Toxic
A common cause of poisoning in cats, often from eating poisoned mice or rats.
Yes. Rat and mouse poisons are the most common pesticide poisoning in cats, usually because a cat eats a poisoned mouse or rat. Some baits contain vitamin D3, which can damage the kidneys.
Signs to watch for
- For vitamin D3 baits: stomach upset, more drinking and peeing, and dangerously high calcium that can injure the kidneys.
How cats get exposed
- Poisoned preyCats are usually poisoned by eating a rodent that has eaten the bait.
Where this comes from
International Cat Care
Rodenticides are the most common pesticides seen in cat poisonings, usually because the cat has eaten poisoned prey (rats and mice).
Checked 9 October 2026
Where this comes from
International Cat Care
Rodenticides are the most common pesticides seen in cat poisonings, usually because the cat has eaten poisoned prey (rats and mice).
Checked 9 October 2026
VCA Animal Hospitals
Exposures to Vitamin D3 (cholecalciferol) occur after ingestion of vitamin D3 supplements, rat/mouse bait containing cholecalciferol
Read "Household Hazards – Toxic Hazards for Cats"
Checked 9 October 2026
Where this comes from
International Cat Care
If you’re concerned your cat has come into contact with any of the substances listed, contact your veterinary team immediately
If possible, take the packaging, plant, or substance with you to the veterinary clinic
Checked 9 October 2026
Where this comes from
VCA Animal Hospitals
Vitamin D3 poisoning can cause stomach upset, increased thirst and urination, and a life-threatening elevation of calcium (hypercalcemia).
Read "Household Hazards – Toxic Hazards for Cats"
Checked 9 October 2026
Where this comes from
International Cat Care
Rodenticides are the most common pesticides seen in cat poisonings, usually because the cat has eaten poisoned prey (rats and mice).
Checked 9 October 2026