Side Effects of Roundworms in Dogs

Roundworms, also known as nematodes, are a common parasite that can infect dogs of all ages. They can cause a variety of symptoms and health problems, so it’s essential to be aware of the potential side effects of roundworms in dogs.

The most common type of roundworm in dogs is Toxocara canis, which is a roundworm that lives in the intestines of infected dogs. These worms can grow up to six inches in length and can cause a variety of symptoms, including vomiting, diarrhea, weight loss, and a pot-bellied appearance. In severe cases, roundworms can also cause anemia and other serious health problems.

One of the most significant side effects of roundworms in dogs is malnutrition. Roundworms consume a significant amount of the dog’s nutrients, which can lead to weight loss and a lack of energy. In addition, roundworms can also cause anemia, which is a condition in which the dog’s red blood cells are not able to carry enough oxygen to the body’s tissues. This can lead to fatigue, weakness, and other health problems.

Roundworms can also cause damage to the dog’s intestinal lining, which can lead to inflammation and bleeding. This can cause diarrhea, vomiting, and other digestive problems. In severe cases, roundworms can also cause blockages in the intestinal tract, which can be life-threatening.

Another potential side effect of roundworms in dogs is the development of a pot-bellied appearance. This is caused by the accumulation of fluids in the abdominal cavity, which can be caused by the worms’ presence. This can make the dog appear bloated and uncomfortable.

In addition to these side effects, roundworms can also cause other health problems. For example, roundworms can migrate to other parts of the body, such as the lungs, liver, or eyes. This can lead to respiratory problems, liver damage, and eye infections.

Roundworm infection can be diagnosed by fecal examination or blood test. The treatment for roundworm infection includes deworming medication that can be given orally or by injection. It is important to note that roundworm infestation can easily be prevented by regular deworming, proper sanitation, and keeping dogs on a healthy diet.

Overall, roundworms can cause a variety of symptoms and health problems in dogs. It’s essential to be aware of the potential side effects of roundworms and to seek treatment if you suspect your dog may be infected. By taking the necessary precautions, you can help ensure the well-being of your beloved companion.


Hannah Elizabeth is an English animal behavior author, having written for several online publications. With a degree in Animal Behaviour and over a decade of practical animal husbandry experience, Hannah's articles cover everything from pet care to wildlife conservation. When she isn't creating content for blog posts, Hannah enjoys long walks with her Rottweiler cross Senna, reading fantasy novels and breeding aquarium shrimp.

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