Dog Worms Types
Roundworms, tapeworms, hookworms, whipworms, heartworms, ringworms (fungal), and lungworms.
Key Warning Signs: Pot belly in pups, visible worm segments near the tail, bloody stool, unexplained weight loss, or persistent cough.
Action Step: Most intestinal worms are treatable with OTC dewormers. Heartworms and lungworms always need a vet. Start with a broad-spectrum dewormer if you spot symptoms.
The types of worms in dogs range from common intestinal parasites to more serious infections that can affect vital organs. Because symptoms are often mild or absent in the early stages, many infestations remain undetected until noticeable health issues appear. Left untreated, these parasites may lead to digestive upset, nutrient deficiencies, anemia, and other complications. Since each worm type behaves differently and requires a specific treatment approach, accurate dog worm identification and proper deworming are essential for effective control and long-term health protection.
What Worms Can Infect Dogs: 7 Types of Worms in Dogs
1. Roundworms
Roundworms are the most common worms in dogs, especially in puppies. They look like spaghetti - white, 3-5 inches long, and you may actually see them in your dog's vomit or stool. A puppy with a pot-bellied appearance and dull coat is a classic sign.
Roundworms in dogs are often passed from mother to puppy before birth or through nursing. Adult dogs can pick them up by sniffing contaminated soil or eating infected prey like mice.
2. Tapeworms
Tapeworms look like flat, segmented ribbons. The clearest sign is small, rice-like white segments around your dog's rear end or in their stool. Dogs typically get tapeworms from swallowing a flea that carries tapeworm larvae, so if your dog has fleas, check for tapeworms.
Dogs that hunt or eat raw prey (rabbits, rodents) are also at higher risk. Unlike most intestinal worms, tapeworms in dogs rarely cause serious illness unless the infestation is heavy.
3. Hookworms
Hookworms in dogs are tiny but dangerous. They latch onto your dog's intestinal wall and feed on blood, which can cause anemia, especially in young puppies. Look for pale gums, dark tarry stool, or unexplained weakness.
Dogs pick up hookworms by walking on contaminated soil (larvae penetrate through paw pads) or ingesting them. A puppy with hookworms can deteriorate fast if you see pale gums; see a vet the same day.
4. Whipworms
Whipworms live in the large intestine and are notoriously hard to detect on stool tests. They cause chronic, watery, sometimes bloody diarrhea and weight loss. Dogs get them by ingesting whipworm eggs from contaminated soil, and those eggs can survive in soil for years.
If your dog has recurring soft stool and you've already ruled out diet issues, whipworms are worth checking.
5. Heartworms
Heartworms are the most dangerous worm a dog can get, and the only one you cannot treat with an over-the-counter dewormer. Transmitted by mosquito bites, heartworm larvae travel to the heart and lungs, where they can grow up to 12 inches long.
Early symptoms are subtle: a mild cough, reduced exercise tolerance. By the time fatigue and breathing difficulty show up, the infection is advanced. Heartworm treatment requires a vet and is expensive and lengthy.
6. Ringworm (Fungal Infection)
Despite the name, ringworm is not actually a worm; it's a fungal infection. It shows up as circular, scaly bald patches on the skin, often on the face, ears, or paws. It's contagious to other pets and to humans.
Ringworm in dogs is treated with antifungal shampoos or oral medication, not dewormers. If you see ring-shaped lesions, isolate your dog and check with your vet before treating.
7. Lungworms
Lungworms are less common but increasingly reported, especially in dogs that eat slugs, snails, or frogs. They cause persistent coughing, breathing difficulty, and exercise intolerance. Some species also cause unusual bleeding (blood clotting problems) - a sign that often gets misdiagnosed.
Lungworms require vet diagnosis (usually via blood test or fecal analysis) and a prescription treatment. They don't respond to standard OTC dewormers.
What Are the Symptoms of Worms in Dogs?
Worm symptoms in dogs vary by type, but here are the most common signs across all intestinal worms in dogs:
- Pot belly or bloated abdomen - common in puppies with roundworms
- Visible worms in stool or vomit - spaghetti-shaped (roundworms) or rice-like segments (tapeworms)
- Scooting along the floor - often tapeworms causing irritation near the rear
- Diarrhea or bloody stool - hookworms and whipworms in particular
- Weight loss despite normal eating - worms steal your dog's nutrients
- Dull coat, lethargy, or general failure to thrive - common in heavy infestations
- Pale gums - a red flag for hookworms; indicates blood loss/anemia
- Persistent cough or breathing issues - heartworms or lungworms
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KWIK TIP: Many dogs with worms show NO obvious symptoms, especially in early infection. Routine fecal tests (at least once a year) catch worm eggs before any signs appear. Don't skip annual vet checkups for this reason alone. |
Best Dewormers for Dogs: Our Top Worm Treatment Picks
Here are some of the best dewormer for dogs, each selected for safety, effectiveness, and ease of use. Always read label directions carefully and consult a vet for puppies under 6 weeks or dogs with health conditions.
1. Elanco Quad Dewormer Chewable Tablets
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Best For |
Broad-spectrum treatment: tapeworms, roundworms, hookworms, whipworms |
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Overview |
Quad Dewormer is a broad-spectrum dewormer that removes four types of common intestinal parasites in a single dose. The beef-flavored chewable makes dosing easy - you can give it directly or mix with a small amount of food. Fasting is not necessary or recommended. |
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Key Benefits |
Treats all four major intestinal worm types in one dose. Beef-flavored, easy to administer, available without a prescription. |
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Safe For Ages |
Dogs weighing 2 lbs or more; not for puppies under 3 weeks of age. |
Elanco Quad Dewormer Chewable Tablets for Large Dogs Over 45 lbs 2 Count
2. Durvet Triple Wormer Chewable Tablets
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Best For |
Dogs 12+ weeks: roundworms, hookworms, tapeworms (7 species) |
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Overview |
Triple Wormer treats and controls roundworms, hookworms, and tapeworms across 7 species with a flavored chewable. Available in formulas for small/puppy dogs and medium/large dogs. No prescription needed. |
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Key Benefits |
Broad OTC coverage across 7 worm species. Separate dosing options for small and large breeds ensure accurate treatment. |
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Safe For Ages |
Dogs over 12 weeks, weighing more than 6 lbs. |
Durvet Triple Wormer Chewable Tablets for Puppies and Small Dogs 2 Count
3. Safe-Guard Canine Dog Dewormer
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Best For |
Outdoor dogs: roundworms, hookworms, whipworms, Taenia Tapeworms - safe for pregnant females |
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Overview |
Safe-Guard uses a single active compound - fenbendazole to treat four worm types with no label warnings or contraindications. So you can treat more with less, minimizing your dog's chemical exposure. |
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Key Benefits |
No warnings or contraindications. Safe for puppies 6 weeks+, pregnant females, and all adult breeds. Treats more worms using fewer drug compounds. |
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Safe For Ages |
Puppies 6 weeks of age or older; safe for pregnant females. |
Safe-Guard Canine Dewormer for Dogs 4gm Pouch
4. Elanco Tapeworm Dewormer (praziquantel tablets) for Dogs & Puppies
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Best For |
Targeted tapeworm removal: single-treatment effectiveness |
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Overview |
If tapeworms are your specific concern, this single-ingredient praziquantel tablet handles the job without treating for other parasites. Place in a pill pouch, hide in food, or give directly - no fasting needed. |
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Key Benefits |
Targeted tapeworm removal in one treatment. No prescription required. Simple, effective, and direct. |
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Safe For Ages |
Dogs and puppies 4 weeks or older |
Elanco Tapeworm Dewormer Praziquantel Tablets for Dogs and Puppies 5 Count
5. Durvet WormEze Dewormer Liquid for Dogs & Cats
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Best For |
Roundworm control in dogs and cats; budget-friendly liquid option |
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Overview |
A liquid roundworm dewormer that can be added directly to food or drinking water. Targets the most common intestinal parasite affecting dogs and cats of all ages. Treat, then repeat in 10 days for complete removal. |
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Key Benefits |
Inexpensive, easy-to-dose liquid. Can be added to water or food. Safe for puppies and kittens over 6 weeks and older. |
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Safe For Ages |
Dogs and cats 6 weeks of age or older. |
Durvet WormEze K-9 and Cat Liquid Dewormer 8oz
6. HomeoPet WRM Clear Dewormer for All Pets
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Best For |
Natural support: tapeworms, whipworms, roundworms, hookworms - all ages |
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Overview |
A veterinarian-formulated natural remedy using plant-based ingredients to support the body's removal of tapeworms, whipworms, roundworms, and hookworms. It does not kill worms directly but may help the immune system expel them. |
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Key Benefits |
Natural, plant-based formula. Easy liquid dosing - add to mouth, water, or food. Suitable for all ages, from puppies to seniors. May also help reduce scooting, rice-like segments in stool, and other visible worm signs. |
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Safe For Ages |
Dogs, cats, and other animals of all ages - from puppies to seniors. |
HomeoPet WRM Clear Dewormer for All Pets 15ml
Conclusion
Understanding the different types of worms in dogs is essential for protecting your pet's long-term health. Regular deworming and preventive care can help detect and address parasitic infections before they become serious and costly to treat. Dogs that spend time outdoors, interact with other animals, or have access to raw prey may face a higher risk of exposure. Following a veterinarian-recommended deworming schedule and monitoring for unusual symptoms can help keep your dog healthy and parasite-free.
Protect your dog with trusted dog dewormers. Shop quality dog health & wellness supplies, dog medications at Kwik Pets and support your pet's well-being year-round.
