One of the most common worms found in dogs is a tapeworm. Tapeworms are an intestinal parasite, meaning that they're inside of your dog's intestines. Along with roundworm, hookworm, and whipworm, this flat, segmented worm is found in dogs, cats, humans, and many other species around the world. Here's what you should know about tapeworms in dogs, including symptoms, diagnosis, and subsequent treatment. How Do Dogs Get Tapeworms? There is a cycle through which dogs get tapeworms. Unlike other parasites that dogs may get from exposure to an infected dog's feces, dogs can only get tapeworms by ingesting a host (most often an adult flea) that has tapeworm eggs inside it. There are a few ways a dog might ingest a flea, such as self-grooming, or grooming a dog or cat housemate. Other animals that can potentially transmit flea eggs include birds, rabbits, or rodents. Once digested, the tapeworm eggs settle into your dog's small intestine. There, t...