Since a friend started us on essential oils, we swear by the amazing benefits of therapeutic grade essential oils and have been using them on the dogs as well, diluted with water or coconut oil in food. We use only therapeutic grade oils which exist naturally in plants and so do not contain chemicals and harmful side effects. Essential oils are very high in anti-oxidants which improve the body's ability to heal, thus boosting the immune system.
A drop of lemon in warm water every morning starts us on the day revitalized and uplifted with the zesty fragrance. Lemon is a tonic for supporting the nervous system and a powerful anti-oxidant, according to researches. We put a drop in the dogs' water dish every day and the dogs love the taste. Their bad breath have improved as well.
Geranium smells great and is an immunity booster and works wonders for repelling insects. We put a drop each on the dogs' tail to keep ticks at bay before their walk each day and they are generally free from tick bites
A very good reference guide to essential oils for animals.