Question: what essential oils are not harmful to dogs?
Answer: Chamomile. Few things in life beat a prime seat on the sofa, a soft blanket, and a cup of chamomile tea. ... 
Frankincense. Frankincense and myrrh date back so far in history, it's no wonder they make the list of safe essential oils for our dogs. ... 
Ginger. ... 
Lavender. ... 
Myrrh. ... 
Peppermint. ... 
Topical Application. ... 
Diffusers.