Low Platelet Count in Dogs

Thrombocytopenia in Dogs

Thrombocytopenia is a medical condition where blood platelets become too low in animals. Platelets are produced in the bone marrow and then released into the blood stream. They also serve the important function of maintaining hemostasis. Low platelet counts can be found in any breed of dog, and at any age. Treatment options do exist and unless the cause of the condition is serious, prognosis for the dog is positive.

Thrombocytopenia affects both dogs and cats. If you would like to learn how this disease affects cats, please visit this page in the PetMD health library.

Symptoms and Types 

Dogs with a low platelet count may display symptoms such as:

  • Fever
  • Lethargy
  • Heart murmur
  • Urinary Bleeding
  • Excessive coughing
  • Excessive nasal mucus
  • Collapse (in severe cases)


Thrombocytopenia can be caused by a variety of factors, including:

  • Leukemia
  • Lymphoma
  • Decreased platelet production
  • Extreme blood loss due to a hemorrhage
  • Increased destruction of platelets in the body (infectious agents are the most common cause of this problem)


Veterinarians will measure the dog’s blood to determine its platelet count and compare the level against normal baselines. He or she will also rule out any recent trauma or other issues related to hemorrhaging.

Typical blood laboratory tests will be able to determine the cause and whether it is due to a more serious underlying medical issue. In some instances, a bone marrow sample may be used to rule out a variety of medical conditions.

When internal bleeding or issues with ruptured organs are suspected, your veterinarian may perform X-rays and ultrasounds on your dog.


A cell that aids in clotting


The prediction of a disease’s outcome in advance


A type of slime that is made up of certain salts, cells, or leukocytes


To control bleeding or stop it


Extreme loss of blood


A condition of the blood in which normal red blood cell counts or hemoglobin are lacking.

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