Tea Tree

Symptoms reported in cats

Most serious first.

1. 1
   Liver injury progressing to potential liver failure Not explicitly specified in the sources. · Because cats lack the specific enzymes to metabolize essential oils, the toxins accumulate and cause serious organ damage. Extreme cases of toxicity can cause complete liver failure and death.
2. 2
   Shaking, tremoring, "walking as if they're drunk" (ataxia), collapse, and seizures Not explicitly specified in the sources. · Essential oils heavily impact the central nervous system. If the toxicity progresses to collapse or seizures, it is a life-threatening emergency.
3. 3
   Depression, lethargy, or dullness Not explicitly specified in the sources. · This is a primary, highlighted symptom specifically associated with tea tree oil poisoning in cats.
4. 4
   Hypothermia (abnormally low body temperature) Not explicitly specified in the sources. · Alongside depression, hypothermia is explicitly noted as a direct consequence of tea tree oil exposure in felines.
5. 5
   Sore skin, redness, or chemical burns Not explicitly specified in the sources. · Direct skin contact with undiluted essential oils causes localized damage. However, the sources warn that even if there is no visible damage to the skin, you should not assume the cat is safe from systemic poisoning.
6. 6
   Difficulty breathing or breathing with their mouth open Not explicitly specified in the sources. · While toxic effects from simply inhaling oils from standard reed diffusers or plugins are rare due to dilution, the risk of severe respiratory distress increases if you use nebulized or ultrasonically diffused neat (undiluted) essential oils, or if the cat has pre-existing medical conditions like asthma.
7. 7
   Excessive dribbling (drooling) and vomiting Not explicitly specified in the sources. · These are common signs of general essential oil poisoning, often occurring if a cat ingests the liquid directly or licks it off its fur during grooming.

Important notes

Tea Tree essential oil, derived from the Melaleuca alternifolia plant, is extremely dangerous for cats and should never be used on or near them. Cats can absorb the toxic compounds through their skin, by inhaling the oil's vapor, or by licking it off their fur. This exposure can lead to severe poisoning very quickly. The oil contains terpenes, a type of compound that a cat's liver cannot properly break down. This causes the toxins to build up in their system, affecting the central nervous system and liver. Even a few drops can be enough to cause a life-threatening reaction. Signs of tea tree oil poisoning include stumbling or lack of coordination, weakness, shaking, a low body temperature, and vomiting. If you suspect your cat has been exposed to tea tree oil, this is a medical emergency. Wash the oil off your cat immediately with dish soap and water, and contact a veterinarian or an emergency animal hospital without delay.

• Toxic compounds: terpene-4-ol, alpha-terpinene, and related monoterpenoids; concentrated in essential oil (never use on or near cats)
• Mechanism: cats lack sufficient glucuronyl transferase to metabolise these terpenoids, causing rapid toxic accumulation affecting the CNS and liver
• Symptoms: drooling, vomiting, ataxia, weakness, tremors, low body temperature, collapse; onset within hours of topical application
• Topical application is the most common cause of toxicity — never use tea tree oil as a flea treatment or skin remedy for cats
• Any tea tree oil exposure is a veterinary emergency — rinse off immediately and contact a vet