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Is Holmstrup Arborvitae toxic to dogs?

Thuja occidentalis 'Holmstrup'

Mildly toxic to dogs

Mildly. The ASPCA lists holmstrup arborvitae as mildly toxic to dogs — a chewing dog typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. This classification follows the ASPCA Toxic and Non-Toxic Plant List. Thuja occidentalis is not individually listed on the ASPCA toxic or non-toxic plant lists; treat with caution and verify with a vet. Foliage and oil contain thujone, which in quantity can cause drooling, vomiting, diarrhoea, and in severe cases neurological signs in dogs and cats. Poisonings are uncommon, but ingestion should be prevented and monitored.

What to do if your dog ate holmstrup arborvitae

  1. Remove any plant material from your dog's mouth and move holmstrup arborvitae out of reach.
  2. Note how much was eaten and when, and watch for drooling, vomiting, or lethargy.
  3. Do not induce vomiting unless a vet or poison-control specialist instructs you to.
  4. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice.
  5. Bring a leaf or photo of holmstrup arborvitae to the appointment so it can be treated correctly.

General guidance, not veterinary advice. If you think your dog has eaten holmstrup arborvitae, contact your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 — do not wait for symptoms to worsen.

Is holmstrup arborvitae toxic to dogs? — FAQ

Is holmstrup arborvitae toxic to dogs?

Mildly. The ASPCA lists holmstrup arborvitae as mildly toxic to dogs — a chewing dog typically gets mouth irritation, drooling, and vomiting rather than a medical emergency, but it is still best kept out of reach. Thuja occidentalis is not individually listed on the ASPCA toxic or non-toxic plant lists; treat with caution and verify with a vet. Foliage and oil contain thujone, which in quantity can cause drooling, vomiting, diarrhoea, and in severe cases neurological signs in dogs and cats. Poisonings are uncommon, but ingestion should be prevented and monitored.

What are the symptoms if a dog eats holmstrup arborvitae?

Thuja occidentalis is not individually listed on the ASPCA toxic or non-toxic plant lists; treat with caution and verify with a vet. Foliage and oil contain thujone, which in quantity can cause drooling, vomiting, diarrhoea, and in severe cases neurological signs in dogs and cats. Poisonings are uncommon, but ingestion should be prevented and monitored. Signs usually appear soon after chewing rather than hours later — watch for drooling, pawing at the mouth, vomiting, loss of appetite, or unusual lethargy after your dog has had access to holmstrup arborvitae.

What should I do if my dog ate holmstrup arborvitae?

Stay calm. Remove any plant from your dog's mouth and take the plant away. Note how much was eaten and when, and do not induce vomiting unless told to. Call your vet or the ASPCA Animal Poison Control Center on (888) 426-4435 and follow their advice; a leaf or photo helps the vet treat it correctly.

Is holmstrup arborvitae toxic to cats too?

The ASPCA classification Growli uses applies to both cats and dogs: Holmstrup Arborvitae is mildly toxic to cats as well. See the full holmstrup arborvitae pet-safety guide for both species.

What is a dog-safe alternative to holmstrup arborvitae?

For a similar look without the risk, see the best dogs-safe plants list — every plant there is ASPCA non-toxic to cats and dogs.

Full holmstrup arborvitae pet-safety