+43 votes
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10 Answers

–1 vote
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Hello, I am sorry to hear about this concern. Yes, worms can certainly cause wieght loss, however, at this age, there are quite a few other issues that can also result in this symptom. That includes degenerative conditions like a myelopathy resulting in muscleloss (results in rapid weight loss), or other systemic (internal) issues like liver ...
–7 votes
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Intestinal parasites can cause malnutrition, weight loss, vomiting, diarrhea, and anemia.

Besides making our pets sick, many of these parasites can affect people.

According to kidshealth.org, "20% of dogs pass toxocara eggs in their stool."

–4 votes
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Here are the 11 most common symptoms of worms in dogs: Coughing. One of the advanced stage symptoms of heartworms in a dog is coughing. Vomiting. Dogs that have worms will often throw up. Diarrhea. Low energy. Pot bellied appearance. Change in appetite. Weight loss. Dull coat.
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Causes of Chronic Weight Loss in Dogs Heartworms or Intestinal Worms. Heartworms and Intestinal worms both cause weight loss in dogs that affect the body... Liver Disease. Liver disease can be brought on by a number of reasons including untreated heartworms, genetic... Kidney Disease in Older Dogs. ...
–2 votes
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Many dogs with whipworms develop few symptoms, but they could include weight loss, dehydration, anemia, a pot-bellied appearance, and diarrhea that may contain blood or mucus. Infestations can be difficult to identify, since whipworms shed eggs intermittently. An examination of even several stool samples may not reveal the presence of whipworms.
–9 votes
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: Intestinal parasites such as hookworms, roundworms, whipworms, and giardia can also cause weight loss in dogs. These parasites are most common in puppies and younger adults or in those boarded in crowded kennels.
+2 votes
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If your dog is infected by these worms, then he can experience symptoms like: Diarrhea Vomiting Weight loss Pot bellied appearance
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Dr. Cailin Heinze, MS, VMD, DACVN, assistant professor of nutrition at the Cummings School of Veterinary Medicine at Tufts University, says that weight loss due to parasitism is less common than it used to be, because many pets receive monthly protection against heartworm and intestinal parasites.
+1 vote
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Symptoms of worms in dogs are dependent on the type of worm, some signs of infection are more obvious than others. For example, a dog with heartworm infection, transferred through a bite of an infected mosquito can have respiratory difficulty, coughing, lose weight, or can exhibit exercise intolerance.
+3 votes
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If your dog shows signs of rapid weight loss, he may have a tapeworm or whipworm. This is due to the parasites feeding on the nutrients in your dogs stomach. As previously mentioned, weight loss can occur even if your dogs appetite is normal or increased. Keep in mind, however, that weight loss may also be a sign of other health issues.

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