Is Mint Poisonous to Dogs?
Mentha sp. · Lamiaceae
Mildly ToxicAlso toxic to cats
Mint is mildly toxic to dogs.
Why it's toxic
The toxic compound in mint:
- Essential oils
Symptoms to watch for
If your dog ate mint, watch for:
- Vomiting (with large ingestions)
- Diarrhea (with large ingestions)
What to do if your dog ate it
- 1Remove your dog's access to the mint and check how much may have been eaten.
- 2Do NOT induce vomiting unless a veterinarian or poison-control expert specifically tells you to.
- 3Call your veterinarian, the ASPCA Animal Poison Control Center (888) 426-4435, or the Pet Poison Helpline (855) 764-7661 right away.
- 4Note the amount eaten, the time, and your dog's weight and any symptoms — have this ready for the expert.
- 5Follow professional guidance and go to the nearest emergency vet if you are advised to.
A consultation fee may apply to the Pet Poison Helpline. When in doubt, contact your own veterinarian or nearest emergency clinic.
Frequently asked questions
- Is mint toxic to dogs?
- Yes. The ASPCA lists Mint (Mentha sp.) as toxic to dogs, cats, and horses. The toxic principle is its essential oils, which can cause vomiting and diarrhea when a dog eats a large amount. Small, incidental nibbles of common culinary mint usually cause only mild GI upset, but mint is officially classified as a toxic plant, so it should not be deliberately fed.
- Which kind of mint is the most dangerous to dogs?
- English pennyroyal (Mentha pulegium), a member of the mint genus, is far more dangerous than culinary mints. It contains pulegone, which is converted in the body to liver-damaging menthofuran and can cause hepatic necrosis, bleeding disorders, seizures, and even death. Pennyroyal is also found in some flea powders and essential oils, and can poison dogs through skin contact as well as ingestion.
- Are mint essential oils or peppermint oil safe for dogs?
- No. Concentrated mint and peppermint essential oils are far riskier than the fresh herb because the toxic essential-oil compounds are highly concentrated. They can cause GI upset and, with pennyroyal-type oils, serious liver injury. Avoid applying mint/peppermint essential oils to dogs or diffusing them where dogs are exposed.
Sources
Last updated 2026-06-25
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This page is for general educational purposes and is not a substitute for professional veterinary advice. Toxicity can vary with the amount eaten, your dog's size, and individual sensitivity. If you suspect poisoning, contact a veterinarian or poison-control hotline immediately.