What are The Symptoms and Treatment For Dog Pinworms? Tips and Suggestion

Dog Pinworms

  • Dogs are among the best carriers of pinworm eggs, which can move easily from one dog to another.
  • Once a dog is diagnosed to have pinworms, it is likely that the whole household will be treated with anthelmintic medications because the parasites are highly contagious and persistent. The contagion can occur from dogs to humans and vice-versa.
  • Female pinworms can measure as long as two to three millimeters while the male parasites are three times longer. The female parasites find their way into the anal area in the evening to lay thousands of eggs, thereby, causing severe itchiness in this region of the dog’s body.
  • There are many species of pinworms, however, the ones that cause pinworms in dogs are not the same as the ones that cause pinworms in humans.


Pinworms are common in crowded facilities and more prevalent in dogs and children. Their color is pearly white. Besides continuous itchiness in the anal area, other symptoms of pinworms include:

  • Stomachache
  • Loss of appetite
  • Nausea
  • Irritability
  • Vomiting
  • White segments in fecal wastes
  • Diarrhea
  • Anemia
  • Sometimes, the appetite is good but the weight still under.
  • Fatigue
  • Behavior problems
  • Irritability

Adult pinworms dwell in the cecal and other areas of the large and small intestines. After the female parasites laid their eggs in the anal part, a part of them appear in the stool of the dog in the morning. Approximately, around 15,000 eggs are laid within a few hours. These eggs are immediately infective and contagious.

In some cases, pinworms are found also in the appendix. In this type of invasion, the appendix is characterized by chronic and acute inflammation.


  • The best cure for pinworm is prevention, which can be achieved by maintaining cleanliness in the entire residential area. The dog’s toys, bowls, and house should be regularly cleansed with disinfectant. If the dog has its own house outside the main house, it should be cleaned with water regularly. The dogs too should have daily wash or bath.
  • If pet owners cuddle and play with their dogs, washing their hands after the physical contact is recommended.
  • Upon diagnosis of pinworms, the veterinarian shall prescribe medicines to combat and kill the parasites. The medicines today are straightforward and specific. Common medicines include:
    • Dichlorvos. It is phosphate-based insecticide targeting the pinworms’ stomach. It is available in pellets.

Piperazine. This is a liquid medicine for pinworms in dogs.

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