Flea & Tick shampoo is a great first step. It kills pests that are on your pet and offers short-term repellency. Our Spot On (for dogs/cats 3+ months) and Collar (for dogs/cats 4+ months) offer an added layer of longer-lasting repellency for pets. If you have younger pets, an active flea infestation, or frequently visit areas not protected by Wondercide, use Flea & Tick Pets + Home spray as well for layered protection.