Why is my dig always do itchy!!? She doesn't have fleas...?

Some natural flea repellents use essential oils for repelling and killing fleas.To protect themselves, certain plants have developed highly effective defense mechanisms against potentially harmful insects. The essential oils of these plants were combined in a solution to form a natural pest control barrier for pets. I am using this product for my dog and the fleas are gone. It's called NATURAL FLEA, TICK AND MOSQUITO REMEDY FOR DOGS. To read more about it you can go on the link below.