This site is developed by the Large Animal Department of the College of Veterinary Medicine at the University of Georgia Comments or questions about this website click here . Roundworms describes a whole bunch of different worm parasites. The most common dog roundworm is Toxocara canis.
Humans have a different roundworm, as do cats, horses, pigs, and other animals.
Dogs get roundworms either from eating worm eggs off the ground or because the mother dog was infected and passed the worms to her puppies during her pregnancy. Adult roundworms have a funny face, with three big lips surrounding their mouth. They feed on partially digested food in the dogs intestine. Hookworms are smaller than roundworms. They are called hookworms because they feed by hooking onto the wall of the intestine.