Essential Oils That Are Bad for Dogs. The most dangerous essential oil for dogs is tea tree oil, which can cause toxicity of the central nervous system, drooling and other issues.

Essential oils do wonders for our mood and well being, so it's understandable to think they might do the same for dogs, with their heightened sense of smell. But in fact, only some essential oils ...

Best doTERRA essential oils. Beginner’s Trio: available at Amazon. Set of three popular and versatile essential oils in lemon, lavender and peppermint.