Is Rosemary Toxic to Cats and Dogs?
Rosemary is a common herb that is considered non-toxic for dogs, cats, and horses. The American Society for the Prevention of Cruelty to Animals (ASPCA) includes rosemary, or Rosmarinus officinalis, on its official list of safe plants. This plant is part of the Lamiaceae family and is also known by the name Anthos.
This non-toxic status means that if a healthy pet chews on a leaf or stem, it is unlikely to cause a serious reaction. However, this does not mean rosemary should be a regular part of a pet’s diet. Even plants considered safe can cause stomach upset if a pet eats too much of them. It is always best to prevent pets from eating large amounts of any plant material.
Rosemary: what the ASPCA database lists
| ASPCA entry | Rosemary |
|---|---|
| Other common names | Anthos |
| Scientific name | Rosmarinus officinalis |
| Family | Lamiaceae |
| Toxic to | None listed |
| Non-toxic to | Non-Toxic to Dogs, Non-Toxic to Cats, Non-Toxic to Horses |
| Toxic principles | None listed |
| Clinical signs listed | None listed |
Rosemary on the ASPCA Non-Toxic Plant List
The ASPCA is a trusted resource for information on plant safety for animals. Its database clearly states that rosemary is non-toxic to dogs, cats, and horses. The plant, whose scientific name is Rosmarinus officinalis, contains no known toxic principles that would harm these animals. Consistent with this classification, the ASPCA does not list any clinical signs of poisoning associated with rosemary ingestion for these species. This confirmation provides reassurance for pet owners who have the plant in their homes or gardens.
What This Means for a Home with Pets
Having a rosemary plant in a home or garden is generally considered safe for households with dogs, cats, or horses. If a curious pet nibbles on a leaf, it should not cause a toxic reaction. Many pet owners appreciate having plants that do not pose a poisoning risk while still adding greenery to their environment.
Even so, it is wise to supervise pets around any plant, including rosemary. Preventing them from eating large amounts of plant matter is a good practice for their overall digestive health. Some pets may have individual sensitivities, and consuming a large volume of fibrous plant material could lead to mild digestive upset. Keeping plants in areas that are not easily accessible can help manage a pet’s interaction with them.
Considerations for Any Non-Toxic Plant
A non-toxic classification means a plant is not poisonous, but it does not mean it is intended as food for pets. A pet that eats a large quantity of any plant material may experience digestive upset. The fibrous nature of plants can be difficult for a cat or dog’s digestive system to handle.
It is also important to be aware of what is on the plant. Pesticides or other chemical treatments applied to rosemary can be harmful to pets, even if the plant itself is safe. If you use rosemary as a seasoning in your cooking, be sure any other ingredients in the dish are also safe for pets before sharing a small amount. Many common cooking ingredients, such as onions and garlic, are toxic to pets.
When to call your vet
A non-toxic listing means the plant is not expected to poison pets, not that eating it is harmless. Call your vet if your pet shows any of the signs below after chewing on a plant.
If your pet has eaten a large amount of rosemary and is showing signs of digestive distress, it is best to contact your veterinarian for guidance. For any urgent concerns about something your pet has ingested, call your vet or the ASPCA Animal Poison Control Center at (888) 426-4435. A consultation fee may apply. Be prepared to share what your pet ate, how much, and when it happened. If possible, keep any packaging from the product for reference.
Emergency signs: go now
- Collapse, fainting or severe weakness
- Seizures, tremors or trouble standing
- Trouble breathing or blue, gray or very pale gums
- Repeated vomiting or retching, or a swollen, painful belly
- Any known contact with a substance listed as toxic, even before signs appear
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- Vomiting or diarrhea that lasts or keeps coming back
- Not eating or drinking, or drinking much more than usual
- Drooling, pawing at the mouth or a swollen face
- Lethargy, hiding or acting unlike themselves
ASPCA Animal Poison Control Center: (888) 426-4435 (a consultation fee may apply). Your own vet or nearest emergency clinic is always a good first call.
Sources
Last checked October 21, 2026. Listings and guidance can change; your veterinarian knows your pet’s health history.