Can Dogs Eat Mint? A Leaf Is OK, but Some Mints Poison

Why mint is only safe in tiny amounts

Garden mints such as spearmint and peppermint contain essential oils that give them their strong flavor. The ASPCA lists mint as toxic to dogs, with vomiting and diarrhea most likely after a large amount. A leaf picked up from the garden or a sprig on a plate is very unlikely to cause trouble.

That is why the honest answer is that mint is tolerated, not recommended. It adds nothing your dog needs. If you are hoping to fix bad breath, that is usually a dental or health issue worth raising with your vet rather than something to cover with herbs.

Spreading a few safe pieces across a snuffle mat or packing them into a puzzle toy turns a small treat into a few minutes of sniffing work.

The dangerous mints and mint products

Pennyroyal is a member of the mint family that contains pulegone, which can cause severe liver damage. It turns up in some gardens, herbal products and natural flea remedies. Any amount eaten, or a pennyroyal oil product on the skin, needs an urgent call to your vet or a poison line.

Wintergreen is not a true mint but often sits beside mint flavors. It contains methyl salicylate, an aspirin-like compound that is dangerous to dogs. Peppermint essential oil, mint diffuser liquid and mint-scented cleaning products are far more concentrated than the plant and should be kept well out of reach.

Candy canes, gum and breath mints

Many sugar-free breath mints, chewing gums and mint candies contain xylitol. Pet Poison Helpline says xylitol can cause a life-threatening drop in blood sugar within 10 to 15 minutes, and enough of it can cause liver failure. Treat any sugar-free mint or gum eaten by a dog as an emergency call.

Candy canes are mostly sugar and can splinter into sharp pieces, and wrappers can block the gut. Mint chocolate chip ice cream, chocolate mints and thin mint cookies add chocolate, which is toxic to dogs. Keep holiday candy bowls, purses and coat pockets out of your dog's reach.

If your dog ate mint

A few fresh spearmint or peppermint leaves: offer water and watch for vomiting or loose stool over the next day. A large amount of the plant: call your vet for advice, especially for a small dog.

Pennyroyal, wintergreen, mint essential oil, or any sugar-free mint, candy or gum: call your vet, the ASPCA Animal Poison Control Center or Pet Poison Helpline now, before signs appear. Have the packaging ready so you can read out the ingredients and how much is missing.

Signs of trouble

Too much fresh mint usually causes vomiting, diarrhea or drooling within a few hours. Xylitol poisoning can bring weakness, wobbling, collapse, trembling or seizures within 15 minutes to an hour, and sometimes later with certain gums.

Pennyroyal and wintergreen can cause vomiting, lethargy, yellowing gums or eyes, and bleeding over the following hours to days. Any of these signs mean go to a vet or emergency clinic straight away. Bring the packaging or a photo of the plant with you so the vet knows exactly what was eaten.

Puppies and safer alternatives

Puppies chew everything, including garden herbs and dropped gum. Keep mint plants in pots out of reach, and check that no sugar-free gum or mints are left in bags at puppy height.

For fresher breath, regular tooth brushing with a dog toothpaste and dental chews made for dogs do far more than mint. For a crunchy snack, try a few slices of cucumber or a carrot stick, which most dogs enjoy and which carry none of the risks of mint products.

This page is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your pet.