Lavender is considered one of the safest of the essential oils. Lavender also has antihistamine properties, making it helpful for dogs with allergies.
Geranium essential oil has anti-inflammatory properties, making it a great massage oil for dogs with injured muscles. It is helpful for anxiety, as well.
Mixed with coconut oil and baking soda, spearmint makes a great “toothpaste” for your dog and is especially helpful in case of bad canine breath.