Websites featuring images of canine stools with worms for viewing and comparison include pet-informed-veterinary-advise.com, petMD and VCA Animal Hospitals. Some feature images of the parasites and descriptions of them in the fecal matter.
Tapeworms are the most common parasite affecting canine intestinal tracks. Veterinarians describe the segments of tapeworms excreted in fecal matter as having the appearance of grains of rice or cucumber seeds. Tapeworm segments are passed intermittently, so they are not always visible in every stool. If a veterinarian's service is required, a stool sample should always be taken to the appointment. A clinical diagnosis is then made by professional observation of live parasites within the dog's anus.