There are many options available for making a homemade fly repellent for dogs. The simplest recipe contains just two ingredients: apple cider vinegar and water. This repellent works both when applied topically or when ingested by the dog. You may also choose a non-toxic mix of essential oils. You need a spray bottle and a clean cloth.
Select one or more essential oils
Idaho tansy, geranium, sandalwood, lavender, rosemary and lemon essential oils have natural repellent qualities without containing the harmful chemicals that are present in most commercial fly sprays.
Fill a clean 32-ounce spray bottle with distilled water
Distilled water can be purchased at most grocery or drug stores.
Add five to 10 drops of the selected essential oil to the spray bottle of water and shake well
It is important to dilute the oil, as applying it directly to the dog's fur or skin while it is undiluted can cause irritation.
Apply the solution onto the dog
Spray the solution on the dog's ears and face, but make sure you avoid the eyes, mouth and nose as you are spraying. Use a damp cloth to dab, rather than spray, the areas around the ears, eyes, nose and mouth.