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If your dog has hemorrhagic gastroenteritis, your vet will have to do many tests to eliminate other possible causes.

There is no known exact cause of the condition.

You may actually see evidence of parasites in your dog's bloody diarrhea.

Your vet will take a stool sample and examine it for parasites.

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What to do if your dog coughs up blood?

  • Heart disease associated with blood clots may cause your dog to cough up blood whereas a heartworm infection can push blood into the airways. Pulmonary hypertension, or high blood pressure, can develop when the arteries are narrowed or blocked, leading to coughing and spitting up blood from the lungs.

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