I would do further research into it's safety and any testing that has been done on it.Foundinfo belowstating that some animals have experienced toxic reactions. Remember that even *natural* substances can produce toxic reactions.
"Melaleuca oil is derived from the Australian tea-tree, Melaleuca alternifolia. It does have antibacterial and antifungal properties and has been used for those purposes topically on dogs and cats. Inappropriate application of products not intended for topical use may result in toxicity, with animals showing signs of incoordination, weakness, tremors, and depression. The efficacy of this agent to repel or kill fleas has not been established at this time.
Reference: Nicholson SS. Toxicity of insecticides and skin care products of botanical origin. Vet Dermatology 1995:6;139-142."
"Tea tree oil (melaleuca oil) is being marketed for the treatment of many disorders in humans and in animals. The active ingredients in tea tree oil have a similar structure and action as turpentine.
Unfortunately, melaleuca oil is potentially toxic and not innocuous as has been suggested.
Animals and humans are getting poisoned from topical use and from accidental ingestion of tea tree oil. Ingestion of approximately 10 mL by a young child caused rapid loss of consciousness.
I have numerous reports on file of toxic reactions from tea tree oil being used topically to treat fleas in animals. Application of "a couple of drops" on the skin of dogs has resulted in shaking and kittens have died from topical application for fleas.
It is also highly toxic to the avian species. The owner of a love bird applied one drop of tea tree oil to a bleeding blood feather of her lovebird. Within 10 minutes the bird collapsed and was on the bottom of the cage. The bird was rushed to the vet. Fortunately, with intensive care treatment, the bird recovered uneventfully.
There is an excellent review article on the toxicity of melaleuca oil in animals in Veterinary and Human Toxicology. Unfortunately I don't have the reference handy, but the article discussed the similarities between the structural formula of melaleuca oil and turpentine and showed that percutaneous absorption caused toxicity in dogs.
In summary, Melaleuca oil is potentially toxic and its safety for use in both animals and humans should be questioned."
GillianWillis- Pharmacist-toxicologist
Tea Tree Oil and toxic reactions on cats:
http://www.thelavendercat.com/generic32.html
http://www.tea-tree-oil-use.com/pets.htm