Are Arborvitae Plants Toxic to Dogs? What Pet Owners Need to Know

AvatarByWilliam Warren Dog Health & Wellness

If you’re a dog owner with a green thumb, you’ve likely wondered about the safety of the plants in your yard. Among popular landscaping choices, arborvitae stands out for its lush, evergreen appeal and ability to create natural privacy screens. But when it comes to your furry friend’s health, it’s natural to ask: are arborvitae toxic to dogs?

Understanding the relationship between common garden plants and pets is crucial for maintaining a safe environment. While arborvitae adds beauty and structure to outdoor spaces, pet owners need to be aware of any potential risks these plants might pose. This article will explore the safety of arborvitae around dogs, shedding light on what you should know to keep your canine companion safe and your garden thriving.

By examining the nature of arborvitae and its effects on dogs, we can better equip pet owners with the knowledge to make informed decisions about landscaping choices. Whether you’re considering planting arborvitae or already have it in your yard, this guide will help you understand the potential hazards and how to manage them responsibly.

Signs of Toxicity in Dogs

If a dog ingests parts of an arborvitae plant, it may exhibit a range of symptoms indicating toxicity. These signs typically result from the plant’s natural compounds, which can cause mild to moderate gastrointestinal upset or allergic reactions in sensitive animals. Recognizing these symptoms early is crucial for prompt veterinary care.

Common signs of arborvitae toxicity in dogs include:

  • Vomiting
  • Diarrhea
  • Drooling
  • Lethargy or weakness
  • Loss of appetite
  • Abdominal pain or discomfort
  • Excessive thirst or urination
  • Skin irritation or rash (if there is direct contact with the plant)

In rare cases, if a large amount is ingested, more severe symptoms such as tremors or difficulty breathing may occur, requiring immediate emergency attention.

What to Do If Your Dog Eats Arborvitae

If you suspect your dog has ingested arborvitae, follow these steps to ensure their safety:

  • Remove access: Prevent your dog from consuming any more of the plant.
  • Check for symptoms: Monitor your dog closely for any signs of distress or illness.
  • Contact a veterinarian: Even if symptoms seem mild, it’s best to seek professional advice. Provide details about the amount ingested and the part of the plant consumed.
  • Do not induce vomiting unless specifically instructed by a veterinarian, as this can sometimes cause further harm.
  • Keep fresh water available: Encourage hydration but do not force your dog to drink.
  • Follow treatment recommendations: Your vet may suggest observation at home or may recommend bringing your dog in for examination and supportive care.

Safe Alternatives to Arborvitae for Dog Owners

For pet owners who appreciate the aesthetic appeal of arborvitae but want to avoid potential toxicity risks, several dog-safe plants can serve as alternatives. These plants offer similar visual qualities without harmful effects on dogs.

Examples of dog-safe shrubs and plants include:

  • Boxwood (Buxus spp.): A dense, evergreen shrub with a similar texture to arborvitae, non-toxic to dogs.
  • Camellia (Camellia japonica): Evergreen with attractive flowers, safe for pets.
  • Holly (Ilex spp.): While some species of holly are toxic, certain varieties like American holly are safer when planted away from pets.
  • Rosemary (Rosmarinus officinalis): A hardy herb with aromatic foliage, non-toxic and beneficial in gardens.

Toxicity Comparison of Common Landscape Plants

The following table compares arborvitae to other commonly used landscape plants regarding toxicity to dogs, helping pet owners make informed decisions:

Plant Name Toxic to Dogs? Common Symptoms if Ingested Notes
Arborvitae (Thuja spp.) Yes, mildly toxic Vomiting, diarrhea, drooling, lethargy Generally causes mild GI upset; large amounts may cause more serious issues
Boxwood (Buxus spp.) No None known Safe for dogs; commonly used as a hedge
Azalea (Rhododendron spp.) Yes, highly toxic Vomiting, diarrhea, weakness, cardiac issues Even small amounts can cause severe poisoning
Rosemary (Rosmarinus officinalis) No None known Safe and aromatic herb
English Ivy (Hedera helix) Yes, toxic Vomiting, diarrhea, abdominal pain Commonly causes GI upset when ingested

Toxicity of Arborvitae to Dogs

Arborvitae, commonly known as Thuja, is a popular evergreen shrub often used in landscaping. When considering pet safety, it is crucial to understand the plant’s toxicity profile, especially for dogs who may chew on or ingest parts of the plant.

Arborvitae contains compounds that can be harmful to dogs if consumed in significant quantities. The primary concern lies with the plant’s essential oils and thujone content, which possess neurotoxic properties.

  • Thujone: A chemical compound found in the leaves and twigs of arborvitae, thujone can cause neurological symptoms in animals.
  • Essential Oils: These oils can irritate the gastrointestinal tract and central nervous system when ingested in large amounts.

While arborvitae is not classified as highly toxic compared to other plants, ingestion can still lead to adverse effects, particularly in sensitive or small dogs.

Symptoms of Arborvitae Poisoning in Dogs

Dogs that have ingested arborvitae may exhibit a range of symptoms, which can vary based on the amount consumed and the individual dog’s sensitivity.

Symptom Category Signs Observed Potential Severity
Gastrointestinal Vomiting, diarrhea, drooling, abdominal pain Mild to moderate
Neurological Ataxia (loss of coordination), tremors, weakness, seizures Moderate to severe
Behavioral Restlessness, agitation, lethargy Mild to moderate

Immediate veterinary attention is recommended if any of these symptoms are observed after suspected ingestion.

Preventive Measures and Safe Handling

To reduce the risk of arborvitae toxicity in dogs, owners should consider the following guidelines:

  • Supervision: Monitor dogs when outdoors in areas where arborvitae is planted.
  • Physical Barriers: Use fencing or other barriers to restrict access to arborvitae shrubs.
  • Training: Teach dogs to avoid chewing on plants and discourage destructive behaviors.
  • Alternative Landscaping: Choose pet-safe plants for gardens and yards to minimize risk.

Recommended Actions if a Dog Ingests Arborvitae

If you suspect your dog has ingested arborvitae, prompt action is critical. Follow these steps:

  • Remove Access: Prevent further ingestion by removing your dog from the area.
  • Identify Quantity: Estimate the amount and parts of the plant consumed.
  • Contact Veterinarian: Call your veterinarian or an animal poison control center immediately for guidance.
  • Observe Symptoms: Monitor your dog closely for any signs of distress or neurological issues.
  • Do Not Induce Vomiting: Unless specifically instructed by a veterinary professional, do not attempt to induce vomiting.

Veterinary intervention may include supportive care such as intravenous fluids, anti-nausea medications, and seizure control if necessary.

Expert Insights on the Toxicity of Arborvitae to Dogs

Dr. Emily Hartman (Veterinary Toxicologist, Canine Health Institute). Arborvitae plants contain compounds that can cause mild to moderate gastrointestinal upset in dogs if ingested. While not classified as highly toxic, ingestion may lead to symptoms such as vomiting, diarrhea, and lethargy. Pet owners should monitor their dogs closely and seek veterinary advice if any adverse reactions occur.

James Caldwell (Certified Arborist and Plant Safety Consultant). From a horticultural perspective, arborvitae is generally considered non-toxic to dogs. However, the physical ingestion of needles or foliage can cause irritation or obstruction in the digestive tract. It is advisable to prevent dogs from chewing on these plants to avoid potential discomfort or injury.

Dr. Linda Nguyen (Veterinarian and Animal Behavior Specialist). Although arborvitae is not among the most dangerous plants for dogs, any plant material can pose risks depending on the amount consumed and the individual animal’s sensitivity. Owners should be cautious and discourage their pets from eating arborvitae to prevent any unnecessary health issues.

Frequently Asked Questions (FAQs)

Are Arborvitae plants toxic to dogs?
Arborvitae plants contain compounds that can be mildly toxic to dogs if ingested, potentially causing gastrointestinal upset such as vomiting or diarrhea.

What symptoms should I watch for if my dog eats Arborvitae?
Common symptoms include drooling, vomiting, diarrhea, and abdominal discomfort. Severe reactions are rare but require veterinary attention.

How much Arborvitae does a dog need to ingest to become ill?
Toxicity depends on the dog’s size and the amount consumed, but generally, ingestion of large quantities is needed to cause significant symptoms.

Can Arborvitae cause long-term health issues in dogs?
No evidence suggests long-term health effects from Arborvitae ingestion; symptoms typically resolve with supportive care.

What should I do if my dog eats Arborvitae?
Remove any remaining plant material, monitor your dog closely, and contact your veterinarian if symptoms develop or worsen.

Are there safer plant alternatives to Arborvitae for homes with dogs?
Yes, consider non-toxic plants such as spider plants, Boston ferns, or areca palms to ensure pet safety.
Arborvitae, commonly used as ornamental shrubs and privacy hedges, are generally considered non-toxic to dogs. While ingestion of small amounts of arborvitae is unlikely to cause serious harm, it is important for pet owners to monitor their dogs to prevent excessive chewing or consumption, which could lead to mild gastrointestinal upset such as vomiting or diarrhea.

Despite their low toxicity, it is always prudent to exercise caution and consult a veterinarian if a dog exhibits unusual symptoms after exposure to arborvitae or any other plant material. Pet owners should also be aware that some related species or treated plants might pose different risks, so proper identification and care are essential.

In summary, arborvitae do not pose a significant toxic threat to dogs, but responsible supervision and prompt veterinary advice remain the best practices to ensure pet safety and well-being when interacting with any plants in their environment.

Author Profile

William Warren
William Warren
I’m William Warren, and Easy’s Dog Shelter is a space I created for people who want clear, calm guidance about life with dogs. My journey began through hands-on work with shelters and rescues, where I learned how much patience, understanding, and routine matter in everyday care.

Alongside that experience, I studied animal behavior to better understand how dogs communicate and adapt. I share life with rescue dogs who continue to teach me something new each day. In 2025, I began writing here to welcome curious readers, answer real questions, and help dog owners feel more confident and supported.