For most pets, the BioPower Pet Shield will be the only pest-repellent product they need to keep fleas and ticks from bothering them. In special situations you might need additional repellent approaches, such as in heavily infested areas, for pets that spend a great deal of time outdoors, or for pets that have a long-term health condition that makes their immune system weak (which also makes them more attractive to pests). The BioPower Pet Flea & Tick Spray is an excellent complement to the tag in such cases.