Giant Platelet disorder - Platelets are cells in the blood that help blood to clot. Platelet counts are included when a CBC, or complete blood count, is run on a blood sample. Many veterinarians are not familiar with this disorder
and will treat these dogs as having an autoimmune thrombocytopenia, which is not needed and is very dangerous for the dog. When observed under the microscope, the platelets will be much larger than normal platelets. While a typical platelet count might be
250,000 to 400,000, cavaliers may have giant platelets with counts of 35,000 to 80,000. This is normal for this breed! Over half of cavaliers have Giant Platelet syndrome.