Captain Zack IRradicate Tick Repellent Powder is a vital for dogs that contains IR3535 which has proves as a tick and ectoparasite repellent and is safe and gentle for your pet's skin. It repels insects like ticks, fleas, lice, mosquitoes, and other bugs. Captain Zack IRradicate Tick Repellent Powder can be used on puppies above the age of six weeks as it is non toxic, safe and can be used daily. It ensures tick free bedding.