Pet safety
Is Western Red Cedartoxic to cats & dogs?
Thuja plicata
Quick verdict — at a glance
- Toxic to cats?
- No — non-toxic
- Toxic to dogs?
- No — non-toxic
- ASPCA classification
- Pet-safe · botanical name Thuja plicata
Is western red cedar safe for cats and dogs?
Yes — western red cedar is listed by the ASPCA as non-toxic to cats and dogs. It is one of the safer picks for a home where pets share the floor space. This classification follows the ASPCA Toxic and Non-Toxic Plant List, the most widely used reference for companion-animal plant safety in the US and the standard most UK vets cite as well. Thuja plicata is not listed as toxic to cats, dogs, or horses on the ASPCA toxic plant lists. Arborvitae species are generally not considered significantly toxic to pets. The foliage contains thujone, which could theoretically cause mild GI upset if consumed in very large quantities, but ASPCA does not classify this species as toxic. Considered pet-safe; consult a vet if a pet ingests large amounts.
| Pet | Toxic? | Per ASPCA |
|---|---|---|
| Cats | No | Pet-safe |
| Dogs | No | Pet-safe |
What happens if a pet eats western red cedar?
Because western red cedar is non-toxic, a curious nibble will not poison a cat or dog. That said, no plant is meant to be eaten: a large quantity of any foliage can still cause mild, short-lived stomach upset or vomiting simply through fibre and volume. Persistent vomiting, diarrhoea, or lethargy after eating any plant is always worth a call to your vet, because the reaction may be to soil, fertiliser, or a pesticide rather than the plant itself.
What to do if your pet ate western red cedar
- Remove any plant material from your pet's mouth and move western red cedar out of reach.
- Note how much was eaten and when, and watch for drooling, vomiting, or lethargy.
- Do not induce vomiting unless a vet or poison-control specialist instructs you to.
- Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice.
- Bring a leaf or photo of western red cedar to the appointment so it can be treated correctly.
This page is general guidance, not veterinary advice. Pets vary, and a reaction may be to soil, fertiliser, or pesticide rather than the plant. If you are worried, always contact a vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms to worsen.
Western Red Cedar and pets — frequently asked questions
Is western red cedar toxic to cats?
Western Red Cedar (Thuja plicata) is non-toxic to cats according to the ASPCA. Thuja plicata is not listed as toxic to cats, dogs, or horses on the ASPCA toxic plant lists. Arborvitae species are generally not considered significantly toxic to pets. The foliage contains thujone, which could theoretically cause mild GI upset if consumed in very large quantities, but ASPCA does not classify this species as toxic. Considered pet-safe; consult a vet if a pet ingests large amounts. It is a sensible pick for a cat household, though no plant should be a regular snack.
Is western red cedar toxic to dogs?
Per the ASPCA, Western Red Cedar (Thuja plicata) is non-toxic to dogs. Dogs that gulp large amounts of any foliage can still get a mild, brief stomach upset, so discourage grazing even on a non-toxic plant.
What happens if my pet eats western red cedar?
Because western red cedar is non-toxic, a curious nibble will not poison a cat or dog. That said, no plant is meant to be eaten: a large quantity of any foliage can still cause mild, short-lived stomach upset or vomiting simply through fibre and volume. Persistent vomiting, diarrhoea, or lethargy after eating any plant is always worth a call to your vet, because the reaction may be to soil, fertiliser, or a pesticide rather than the plant itself.
What should I do if my cat or dog ate western red cedar?
Stay calm. Remove any remaining plant material from your pet's mouth and take the plant away so they cannot eat more. Note roughly how much was eaten and when. Do not make your pet vomit unless a vet or poison-control specialist tells you to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 (a consultation fee may apply) and follow their advice. Bringing a photo or a leaf of western red cedar to the appointment helps the vet treat it correctly.
Which other plants are safe for cats and dogs?
Reliable non-toxic houseplants on the ASPCA list include spider plant, areca palm, calathea, peperomia, and most true ferns. You can browse Growli's full pet-safety library to check any plant before you buy it, and every entry cites the ASPCA classification it is based on.
Full western red cedar care
Pet-safety is one piece of the picture. For light, watering, soil, and troubleshooting, see the complete western red cedar care guide, or browse the full pet-safe plant library to check another plant before you buy it.