Tapeworms in Dogs: Diagnosis, Treatment and Prevention

If you’ve ever spotted small rice-like segments in your dog’s poop or under their tail, you’ve probably encountered tapeworms. But don’t worry — while these segmented parasites can be gross to look at, they rarely cause serious harm and are easily treated with help from your veterinarian.

Here’s what you need to know about tapeworms in dogs, including where they come from, what to look for and how to prevent future infections.

What Are Tapeworms in Dogs?

Tapeworms are ribbon-like cestode worms that live in an infected dog’s intestines, where they attach to the intestinal lining and absorb nutrients from digested food. The most common tapeworm species in dogs is Dipylidium caninum, which is transmitted by infected fleas. While tapeworms rarely cause visible symptoms in healthy adult dogs, heavy infections can be dangerous for puppies. Although rare, some less common tapeworm species are a public health concern.

There are three main species of tapeworm in dogs. Although Dipylidium caninum is the most common, understanding how other tapeworm species are transmitted and spread can help you protect your dog from infection. They include:

• Dipylidium caninum
• Echinococcus spp
• Taenia spp

How Do Dogs Get Tapeworms?

Dogs become infected with tapeworms when they ingest an intermediate host carrying tapeworm larvae. This is most commonly an infected flea, which may be swallowed when the dog chews at their skin or fur in response to a flea bite or while grooming themself. Once ingested, the larvae mature into adult tapeworms in the dog’s intestine. Mature tapeworms can grow up to 11 inches long and are made up of many short segments known as proglottids. Each proglottid contains up to 20 tapeworm eggs. These proglottids are periodically passed in the dog’s stool and may be seen around the anus or on bedding. While fresh proglottids may move or crawl, they dry rapidly in the environment. It’s important to know that dogs can’t get tapeworms by ingesting proglottids or the feces of an infected dog.

Other tapeworm species, such as Echinococcus and Taenia, spread similarly but through different intermediate hosts — typically small prey animals, including birds, mice or rabbits.

What Are the Symptoms of Tapeworms in Dogs?

While spotting a wiggling proglottid on your dog’s poop or dried segments on their bedding can be alarming, most infected dogs do not experience noticeable illness. Some dogs may scoot to relieve itching caused by passing proglottids.

Rarely, dogs or puppies with heavy tapeworm infestations may have a poor appetite, a dull coat and reduced energy.

How Are Tapeworms in Dogs Diagnosed?

Tapeworms may be diagnosed based on the presence of visible proglottids. Often, the sight of tapeworm segments prompts owners to seek veterinary attention. Even if no proglottids are found, your veterinarian may suspect tapeworm infection and recommend treatment if your dog has fleas.

A fecal flotation test (intestinal parasite screening) is commonly used to check for intestinal parasites, though it may not detect tapeworms. Because tapeworms shed eggs only at certain times, false negatives are common. In these cases, treatment is still recommended. Fecal flotation is also helpful in identifying other parasites, such as roundworms or hookworms, that may be present. The national average* cost for a fecal exam in the United States is $58.¹

Although not routinely recommended, additional fecal testing, such as a polymerase chain reaction (PCR) test, may be used to determine tapeworm species.

How Are Tapeworms in Dogs Treated?

Tapeworm treatment in dogs involves eliminating existing parasites and preventing reinfection. Your veterinarian will prescribe a deworming medication, such as praziquantel or fenbendazole, which may be given as an oral tablet or an injection. These medications work by causing the adult tapeworms to detach from the intestinal lining. The dead tapeworms are then typically digested by the dog’s intestines, rather than passed in the stool.

Preventing reinfection is equally important. Since fleas are the most common source of tapeworms, flea treatment and consistent flea prevention are key to stopping new infections. Year-round, monthly flea treatments break the flea life cycle and provide steady protection. Additionally, you should also prevent your dog from eating small prey animals, such as birds, mice and rabbits, which can carry other tapeworm species and additional parasites.

Tapeworm treatment costs will vary depending on the severity of your dog’s infection and your location. The average* cost of deworming medication is $40, and the average* cost of flea and tick prevention is $36 per month.¹

Preventing Tapeworms in Dogs

Preventing tapeworms primarily involves limiting your dog’s exposure to infected fleas and small prey like rodents or birds. Since dogs can only get tapeworms by swallowing an infected host, taking steps to reduce these opportunities can significantly lower the likelihood of infection.

In addition to year-round flea prevention and supervising your dog’s outdoor activities, routine deworming provides an added layer of protection. Since many monthly heartworm preventives also include a broad-spectrum dewormer, it's easy to add this step to your dog’s regular health routine. The average* cost for heartworm prevention in the U.S. is $23 per month.¹

Protect Your Dog’s Health From Tapeworms

Tapeworms are never a welcome sight, but spotting them can reveal gaps in your dog’s prevention routine. Knowing how to recognize proglottids and how these parasites are transmitted helps you take action quickly. Work with your veterinarian to treat your dog’s tapeworms and reduce the likelihood of future infections.

Frequently Asked Questions About Tapeworms in Dogs

Parasites can prompt many questions. Here are our answers to common questions pet owners ask about tapeworms in dogs.

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Author Bio

Angela Beal, D.V.M., has more than 20 years of experience as a veterinarian. Leveraging her background in private practice and academia, she uses her passion for writing to convey information to pet owners to help them keep their pets healthy and happy.