Dog Worming Treatments: Chews, Tablets & Spot Ons.Flea, Tick & Worming Treatments For Dogs. With OzPetWorld's supply of flea, tick, and worm treatments, you can keep your pet healthy. Whether you have a puppy or an adult dog, you'll find products that will help you protect them from these parasites, ensuring that no nasty surprises await underneath all that cute fur. If left untreated, parasites can cause irritation, serious health issues, and even death in dogs. OzPetWorld offers the latest products to help you care for your dog. Use our Flea, Tick and Worm Treatment Finder to make sure the product you choose is age- and size-appropriate as well as treating pests that are common to your area. Always check with your veterinarian before starting any heartworm preventative, as treatment could have adverse effects if your pet is already infected.