The pre-death symptoms of canine parvomyocarditis include vomiting, diarrhea, fever, shortness of breath, rapid heartbeat, weak pulse, pale mucosa, irregular heartbeat, etc. Generally, parvomyocarditis-type parvomyocarditis will occur suddenly and die within a few hours of onset. It will die and is difficult to save. Therefore, dogs should be vaccinated in time after two months, and do not bring the dog into contact with other unhealthy dogs to reduce the infection rate.