Why does my dog ​​vomit long worms? What medicine should I take?

Jul 26,2025
3Min

Why do dogs vomit long worms

The reason why dogs vomit long worms is because internal parasites have caused a great burden on dogs, so they must find a way to vomit them out.


What are the long worms

Ascariasis

Ascariasis is a disease caused by Ascaris canis and Ascaris leonata. Canine roundworms are mainly released in puppies between 1 and 2 months old, while lion roundworms are parasitic in dogs over 6 months old. Both types of roundworms excrete eggs through the feces of sick dogs. Under conditions of appropriate temperature and humidity, they develop into invasive eggs in 3-5 days.


Why do dogs become infected with roundworms

Dogs swallow feed and drinking water contaminated with roundworm eggs, and the larvae hatch in their intestines. In the former, the larvae enter the intestinal wall and flow into the lungs with the blood, then go up along the bronchi and trachea to the larynx and are swallowed, and finally develop into adult worms in the small intestine.

What are the symptoms of dogs infected with roundworms

Dogs infected with this roundworm appear to be emaciated, pale mucous membranes, loss of appetite, vomiting, and delayed development. A large number of roundworm parasites can cause intestinal obstruction or blockage of the bile duct. Ascaris toxins can also cause epileptic neurological symptoms.

What to do if your dog vomits worms

The owner should immediately give the dog an anthelmintic drug to eliminate the parasites in the dog's body. Anthelmintics containing mebendazole are effective against roundworms, pinworms, hookworms, whipworms and nematodes. Commonly available low-toxic anthelmintic drugs on the market include Bayer, Samba, Remigo, etc.
No matter whether the dog has a parasite problem, the owner should deworm the dog regularly. Don’t wait until the problem occurs before it is too late to solve it. No matter what the problem is, prevention is better than cure.


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