The dog is globally recognized as the man's first domesticated animal because of its fidelity, loyalty, obedience and pleasant disposition. Since the beginning of human civilization, they have been bred and selected for different purposes like guards, sports and reserve of wounded humans. Helminthes are classified into tapeworms (cestodes), roundworm and trematodes (flukes). Helminthiasis is one of the most important animal diseases worldwide, resulting great production and health losses in animals. Among the dogs, roundworms are active in the intestines of puppies, often causing a pot-bellied appearance and poor growth. The worms may be seen in vomit or stool; a severe infestation can cause death by intestinal blockage.