While you may think the reason we put a bandana on your dog is so that your little friend looks nice when he leaves our shop, a bandana may also be a useful tool. At home, we like to mix a little volatile oil with some water, soak the bandana in it, wring it out and tie around the neck. The oils you choose may be simply scents you think smell nice, but we use oils that repel fleas and ticks. Voilà, a nice-looking flea collar without using any chemicals. Of course, be certain that any oil you use is not harmful to your pet.