What Do Parasites Look Like In Dog Poop?

What Do Parasites Look Like In Dog Poop? They look like white, firm, rounded strips of spaghetti, one to three inches long. Your veterinarian will look for signs of roundworms in the stool sample. Some of the symptoms of roundworm are coughing, vomiting, diarrhea, or malnourishment. How do you get rid of parasites in dogs?