Drontal Wormers Chewables For Dogs Up To 35Kg Red provides comprehensive protection for puppies and dogs against roundworms, hookworms, whipworms and tapeworms, including controlling the shedding of Giardia spp cysts. This powerful treatment is required every three months from six months of age, offering a convenient alternative to monthly doses. Available in Chews, Tablets, and a Puppy Suspension, Drontal makes it easy to keep your pet safe and healthy with minimal effort.