Is Essential Oils Toxic to Cats and Dogs?
Essential oils (tea tree, citrus, eucalyptus, clove) are severely toxic to cats and risky for dogs. Cats lack the enzyme to clear them — an emergency.
Potentially life-threatening — treat any exposure as an emergency.
Can cause real harm — call a vet for guidance.
In an emergency, do not wait.
Medical disclaimer: This tool is for general information only and isnot a substitute for veterinary diagnosis or treatment. Toxicity depends on the amount, your pet’s size, and health history. If your pet may have ingested something harmful, contact your veterinarian or a poison control hotline ((888) 426-4435 / (855) 764-7661) immediately — do not wait for symptoms to appear.
What is Essential Oils?
Essential oils (tea tree, citrus, eucalyptus, clove) are severely toxic to cats and risky for dogs. Cats lack the enzyme to clear them — an emergency.
Also known as: tea tree oil, melaleuca, eucalyptus oil, citrus oil, clove oil, pennyroyal, wintergreen, peppermint oil, diffuser oil.
Symptoms to Watch For
🐈 In Cats
- Drooling, vomiting, and wobbliness
- Tremors, severe depression, or collapse
- Low body temperature and low heart rate
- Liver failure and breathing difficulty in serious cases
🐕 In Dogs
- Drooling and vomiting
- Wobbliness, depression, or weakness
- Tremors or a low body temperature
- Liver damage with larger or repeated exposures
What to Do If Ingested
- Call a veterinarian or poison hotline immediately.
- Note which oil was involved, the concentration, and whether it was licked, applied to the skin, or inhaled.
- If it was on the skin, wash the area with dish soap and rinse well.
- Do not induce vomiting unless a professional directs it.
Steps apply to both cats and dogs. When in doubt, call a vet or poison hotline before acting.
When to Call the Vet Immediately
Call your veterinarian or a poison control hotline right away if you notice any of these:
- Any essential oil was ingested or applied to a dog
- Drooling, vomiting, or wobbliness
- Tremors, weakness, or depression
- Yellowing of the eyes or gums (liver signs) in following days
Frequently Asked Questions
Frequently Asked Questions
Why are essential oils so much more dangerous to cats than dogs?
Cats lack the liver enzyme glucuronosyltransferase (UGT), which other species use to break down the phenols and terpenes in essential oils. Without it, the compounds build up and damage the liver and nervous system. Even small amounts on the skin, from a diffuser, or licked off fur can be life-threatening to a cat.
Which essential oils are most dangerous to pets?
Tea tree (melaleuca), pennyroyal, citrus (d-limonene and linalool), eucalyptus, clove, cinnamon, wintergreen, peppermint, pine, and ylang ylang are among the most toxic. Concentrated oils and oil-based products (like some "natural" flea treatments) are the highest risk. Keep all pure oils and diffusers away from cats especially.
Are essential oil diffusers safe around cats?
Not reliably. Diffusers release micro-droplets that settle on a cat's fur and are then licked off during grooming, and the inhaled vapors can also irritate sensitive airways. Avoid using diffusers in rooms cats cannot leave, and never apply essential oils to a cat for fleas or any other reason.
Sources
This entry is reviewed against the following authoritative veterinary sources.
Last reviewed: 2026-07-11