Please be careful using even diluted essential oils. Dogs absorb it through the skin, inhale it when smelling it. Talk to your vet.
::::::Peppermint is considered toxic to dogs by the ASPCA. In small doses, however, it is generally safe. That does not necessarily make it good for dogs. If you want to use a flea repellent that contains peppermint, talk to your veterinarian about which products are safe for dogs, how to apply them, and the correct dosage.Sep 5, 2017<<
https://www.petpoisonhelpline.com/pet-safety-tips/essential-oils-dogs/
https://www.cbc.ca/news/canada/nova-scotia/health-essential-oils-pets-caution-1.4549013
::::'Like oil and water,' essential oils and your pet may be a bad mix
'These products are not tested on animals at all,' says Nova Scotia veterinarian
While some essential oils can be useful in treating some animal issues, he said there are concerns about the high concentrations of the oils, while even those that are diluted may use a substance that itself is harmful to pets.:::