Formulated with natural cinnamon oil, clove oil and cedar oil which kills fleas, ticks, black flies, and mosquitoes. Fully effective on fleas for up to 7 days. Can be used around all ages of dogs from puppies to adults. Easy to use, just apply shampoo onto coat of pet and work into coat. Works on all stages of the insect’s life-cycle and can be used in conjunction with spot treatments.