Changes

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  |<center>'''Class 1'''</center>   

  |<center>'''Class 1'''</center>   

  |asymptomatic to mild HW disease, with no clinical or radiographic signs and no laboratory abnormalities. Subjective signs such as loss of condition, decreased exercise tolerance, or occasional cough might be seen.

  |Asymptomatic or mild disease. Weight loss, reduced exercise tolerance or an occasional cough may be seen, No radiographic signs or laboratory abnormalities.

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  |<center>'''Class 2'''</center>  

  |<center>'''Class 2'''</center>  

  |derate HW disease, characterized by an occasional cough and mild-to-moderate exercise intolerance. A slight loss of condition, increased lung sounds, and mild to moderate radiographic changes, such as right ventricular enlargement, are present. Laboratory results may show anemia and proteinuria.

  |Moderate disease. Animal coughs occasionally ahd shows mild-to-moderate exercise intolerance. Lung sounds may be increase, and radiography may show mild-to-moderate changes, e.g. right ventricular enlargement. Anemia and proteinuria may be present.

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  |<center>'''Class 3'''</center>  

  |<center>'''Class 3'''</center>