Therapeutic-grade essential oils, including lavender, repel fleas and ticks. A dog owner can use lavender oil to repel fleas and ticks by misting the dog daily with a simple spray-on solution containing either witch hazel or spring water combined with several drops of lavender oil.
Not only does lavender oil repel fleas and ticks, but it also soothes irritated skin and aids in the healing process. It can also boost a dog's immune system. A dog owner can also add lavender oil to pet shampoo. Allowing the lathered shampoo to sit for 20 minutes kills any fleas or ticks that might be found in the dog's coat.