PETARMOR Plus Flea & Tick Shampoo for Dogs PetArmor Plus Flea & Tick Shampoo for Dogs kills fleas for 15 days and ticks for 7 days, even after complete rinsing This nontoxic medicinal shampoo protects dogs and puppies over 12 weeks old from reinfestation by killing flea eggs and flea larvae for 30 days Flea and tick shampoo treatment for dogs kills ticks that may spread Lyme disease PetArmor dog flea & tick bath washes away the flea dirt that flea larvae eat to survive Flea shampoo disrupts the flea life cycle by preventing flea eggs from developing into adult fleas