There are quite a few anecdotal reports that claim that hydrogen peroxide and honey can help ease the dry, hacking coughing caused by kennel cough. Add 3 drops of hydrogen peroxide (food grade) to a teaspoon of honey mixed into a large glass of water. Let your dog drink up the water as soon as possible. Hydrogen peroxide loses its potency after a few hours in water, so you need to give your dog a fresh new bowl of honey water with hydrogen peroxide every few hours. Raw Honey