Is Arborvitae Toxic to Cats?
Also known as: Eastern White Cedar, American Arborvitae · Thuja occidentalis
What makes it toxic
Thujone and related volatile oils in the foliage and bark. They are gut irritants and in significant doses can affect the nervous system.
Warning signs to watch for
Vomiting, diarrhea, drooling and lethargy within a few hours. Large ingestions may add tremors, weakness or unusual behavior.
What to do if your cat eats it
Remove access to the plant and offer water. Call your vet if vomiting continues past a few hours; seek emergency care for tremors, seizures or collapse.
Common questions
My cat chews the arborvitae hedge — how bad is that?
Occasional nibbles usually cause mild stomach upset only, but repeated chewing of foliage concentrates the risk. Discourage the habit and monitor for vomiting.
Are cedar shavings dangerous to cats too?
Cedar bedding can release the same oils. Cats that groom dust off their coats may absorb irritating compounds, so avoid cedar bedding for pets.
More plants checked for cats
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.