I use Doterra Oils on me and in my business in diffusers to help calm the grooming environment. 
I use this everywhere, on my temples when I feel a head ache coming on, in my mouth for bad breath, on my skin when I need muscle pain relief.  I also enjoy it in my diffuser.  
"Many essential oils, such as eucalyptus oil, tea tree oil, cinnamon, citrus, pennyroyal, peppermint, pine, sweet birch, wintergreen, and ylang ylang are toxic to pets".
Some oils are sensitive to humans and pets. Please research the oils you use around your pets. All Sales Final.