Eliminate fleas and ticks with the 2X flea killing effectiveness of Vet's Best Flea and Tick Advanced Strength Shampoo. Our plant-based formula contains 100% certified natural essential oil to kill fleas, flea larvae, flea eggs, and ticks on contact. Our proven effective formula is easy to lather and rinse, cleaning and deodorizing your dog's coat, and leaving behind a light rosemary and peppermint scent. For dogs and puppies 12 weeks and older.