First time dealing with the barking cough...ugh, breaks my heart! Looked it up in my favorite Essential Life book, and made up this blend to help my little guy recover faster. 5 drops each Arborvitae, Wild Orange, Lemon, Douglas Fir, and Breathe. Top with FCO and shake. Apply to the throat, behind the ears, back of neck, and bottoms of feet. We are also diffusing Thyme, Marjoram, and Breathe, and taking him outside to breathe cool air.