Is Thyme Toxic to Dogs?

⚠️ Mildly ToxicSeverity: Mild

✅ Cross-checked against veterinary poison-control guidance · Oct 2026 audit

⚠️ Educational info only. If your pet just chewed something and looks unwell, skip the reading and call your vet or Pet Poison Helpline (US): (855) 764-7661.

Thyme is only mildly toxic to dogs. A few leaves are harmless to most dogs, but eating a large amount of the herb can upset the stomach.

Also known as: Common Thyme, Garden Thyme, Thymus vulgaris · Thymus vulgaris

What makes it toxic

Thymol and carvacrol essential oils that irritate the gastrointestinal lining when consumed in quantity.

Warning signs to watch for

Vomiting, diarrhea and mild abdominal discomfort within a few hours of a large meal of the plant.

What to do if your dog eats it

Offer water, keep the dog from eating more and monitor. Contact your vet if vomiting is repeated or lasts more than a day.

Common questions

Can dogs have thyme in their food?

Small culinary amounts are generally fine and thyme is often listed as one of the safer herbs for dogs. Avoid concentrated essential oil, which is a different risk level.

Is thyme oil dangerous if diffused around dogs?

Concentrated thyme essential oil can irritate airways and should not be diffused in closed rooms or applied to a dog. The leafy herb is a much milder concern.

More plants checked for dogs

Pothos☠️ ToxicYes, pothos is toxic to dogs. Chewing any part of the vine releases calcium oxalate crystals tha Aloe Vera⚠️ Mildly ToxicAloe vera is mildly to moderately toxic to dogs. The skin and latex layer of the leaf contain co Spider Plant✅ Non-ToxicNo, spider plants are non-toxic to dogs. A dog that nibbles the arching leaves is not at risk of Easter Lily⚠️ Mildly ToxicEaster lilies are only mildly toxic to dogs — they usually cause stomach upset, not the fatal ki Sago Palm☠️ ToxicYes — sago palm is severely toxic to dogs, with a documented fatality rate around 50% when untre Boston Fern✅ Non-ToxicNo, Boston ferns are non-toxic to dogs. Chewing a frond will not poison your dog.

This page is general educational information, not a substitute for professional veterinary advice. Every pet is different — if your animal ate something concerning, contact your veterinarian or a pet poison hotline right away. Checking what your pet can eat? Visit our sister site SafeOrToxic.