Yes. After treatment, fleas and ticks get very active as they die, and move to the top of the pet’s coat, where they are more visible. This is actually a sign that the product is working. However, if you’re seeing fleas several days or weeks after applying PetArmor Plus, you may have an infestation in your yard or elsewhere. Remember to treat all pets in your house with PetArmor Plus every 30 days throughout the year to help protect your pets from fleas and ticks.