We get this question a lot, and it deserves a real answer rather than a blanket "herbs are natural, so they're fine." Natural doesn't mean harmless (plenty of genuinely dangerous things are natural), and pets metabolise plants differently than people do. Cats in particular lack an enzyme (UDP-glucuronosyl transferase) that most mammals use to break down certain plant compounds, which is why cats are often the more sensitive case.
The ones we can confirm are low-risk
According to the ASPCA's own toxic and non-toxic plant lists, both rosemary and garden sage are non-toxic to cats and dogs in normal quantities. These are two of the more worry-free herbs in our pantry if you share your home with animals.
The ones worth real caution with
A handful of herbs in our catalogue carry documented risk if a pet ingests them in quantity, and are worth keeping genuinely out of paw's reach rather than left in an open sachet:
- Rue: ASPCA-listed as toxic to cats and dogs; ingestion can cause stomach pain, vomiting, and in serious cases convulsions, and skin contact can cause irritation and photosensitivity in sunlight.
- Wormwood: contains thujone, which is toxic to dogs at meaningful doses, with symptoms including vomiting, tremors, and seizures.
- Comfrey Root: contains pyrrolizidine alkaloids, which are hard on the liver in dogs and have been linked to reactions in cats as well.
- Lavender: ASPCA-listed as toxic to cats, dogs, and horses if ingested in quantity (nausea, vomiting, loss of appetite), even though dried lavender in a sachet or dream pillow that stays out of reach is a very different exposure level than a pet eating the plant directly.
What this means practically
A sealed sachet sitting on a shelf is low risk for basically anything in our catalogue. The concern is a pet getting curious and chewing into loose dried herb, a spell jar, or a pack. Our general advice: keep any herb products, especially the four above, somewhere your pet can't get into on their own, the same way you would with anything else you wouldn't want them eating. Packs and kits that include rue or wormwood are labelled with their contents, so you can check before deciding where to store them.
We haven't individually stress-tested all 56 herbs in our pantry against veterinary toxicology data, and we're not going to guess. If you're wondering about a specific herb that isn't listed above, the ASPCA's toxic and non-toxic plant database is searchable and free, and it's a better source than our best guess. If you think a pet has already got into something, ASPCA Animal Poison Control is reachable at (888) 426-4435, or contact your own vet.
