Essential Oils can be very beneficial for dogs.  When introducing oils, start out with a higher dilution with fractionated coconut oil (FCO).  Keep in mind the size of your dog; smaller dogs need a higher dilution and larger dogs may need less.  Use the oils aromatically; in a diffuser, a spray in the air along with water, or by putting a drop on your hand and allowing the dog to smell.  Topical uses are along the spine, petting hair backwards, behind ears, on belly, between ...