A natural way to keep fleas at bay from your dog -- and your home -- is to use essential oils like cedar or lavender. The scent from the oils is pleasant to us, but for fleas, not so much. But rubbing essential oils all over your dog's coat can be messy and difficult. One easy way to deliver the benefits of essential oils when playing outdoors with your dog is to use an old bandana. Dilute five drops of essential oil with 1/2 cup cool water. Soak the bandana in the oily mixture and gently wring out. Tie it around your dog's neck, and it'll act like an all-natural -- not to mention stylish -- flea collar.