Tea tree oil and horses


Many of us are familiar with tea tree oil, an increasingly popular ingredient in horse grooming products. I’ve even seen it on the shelves of some grocery stores and health food shops.


Jump to shopping


But is tea tree oil safe to just buy a bottle and start dabbing it on your horse?


  • The short answer is NO, don’t just buy a bottle and start dabbing. The long answer is also NO, but the details follow if you are curious. However, some tea tree concoctions are safe for horses, but undiluted tea tree oil may be too harsh for your horse.

Tea tree oil comes from the Melaleuca alternafolia plant, found in Australia.


  • It is commonly used to help clear up bacterial and fungal infections, and there is great antidotal information about its use on horses to fight rain rot, thrush, cuts/scrapes, and even scratches and ringworm.


  • There are two ingredients to be aware of in this essential oil, 1,8-cineole and terpinen-4-ol. Australian standards (incidentally the only country with standards for tea tree oil) dictate the 1,8-cineole to be about 15% and the terpinen-4-ol to be about 30% or more.


  • You should also know that the 1,8-cineole is a very serious irritant and exposure to air increases the risk of allergic reactions and irritation. The exposure to air, light, and heat increase the breakdown of components of the oil and increase their tendency to irritate and cause more problems. Which I interpret to mean that keeping a bottle at the barn is probably not a super good idea.




Tea tree oil can be toxic


  • Tea tree oil is very toxic and can lead to lethargy, confusion, diarrhea, and even coma and death if ingested.


  • So, if you use it topically on your horse, be sure it’s formulated correctly AND he won’t lick it.


  • Tea tree oil is also crazy toxic to cats, so be sure Fluffy the barn mascot won’t be touched by it.


  • You should also avoid this stuff at all costs if you are pregnant or nursing.


  • Here’s where it gets even more unclear/fuzzy/risky. There have been no large-scale clinical trials done on tea tree oil use for humans or horses. There have been a few small trials done on humans, but no small ones done on horses.




Adding to the confusion, some manufacturers don’t label the percentages of 1,8-cineole and terpinen-4-ol, so you can’t be sure of the quality of the oil you are buying.


  • Here’s the other problem I ran into. There is ZIPPO research on the appropriate dilution of oil to use for horses.


  • The general idea is about 5% for people, and anything over 10% for people and you are walking a fine line between benefit and your skin blistering and peeling off.


  • I found some non-scientific information about the percentages to use on horses, but since no sources said the same thing, I’m not going to pass on this confusing mess.


  • So, in a nutshell, you will never find me with a bottle of pure tea tree oil. You will find me with bottles of shampoos, hoof oils, ointments, or sprays containing tea tree oil.


  • And only because I know reputable manufacturers have lovingly created them to exacting and precise standards. I am not a reputable manufacturer, and there is no way I would trust myself to concoct and store a dilution of this stuff when I find that making toast is hard.




Work with your vet


  • I have used wonderfully manufactured products that contain tea tree oil, and not only do I love the smell, but I also love how they work in conjunction with a treatment plan outlined by a veterinarian.


  • Just to be perfectly clear – I am not saying “I hate tea tree oil.” I’m actually saying “I like tea tree oil, I have used it and it can help. I just think it’s best for us as horse owner folks to consult their vets.”


  • And, as with all things bacterial and fungal that we would want to use tea tree oil for, please consult with your veterinarian before you do any treatment plan.




Stock up here for your horse supplies! As an Amazon Associate, I earn from qualifying purchases, but it’s ZERO extra cents to you.  You can also visit my Amazon storefront here:  PEG storefront.

SHAPLEY'S Medi-Care Med Shampoo W/Tea Tree & Lemon Grass, 32 oz
$18.95 $17.99

The best shampoo for shine and soothing.

06/06/2024 02:03 pm GMT
06/12/2024 05:37 am GMT
06/12/2024 05:33 am GMT



Thank you!