The most serious symptoms of parvovirus in dogs include diarrhea, difficulty breathing, heart failure, dehydration, red and bloody stools, etc. Generally, the most serious period is on the fourth and fifth days of parvovirus, and on the sixth or seventh day Days will begin to improve. When a dog is found to be infected with parvovirus, it needs to be sent to a pet hospital for active treatment in time to avoid life-threatening injuries. Parvovirus generally requires symptomatic treatment, including antivomiting, diarrhea and hemorrhage, and at the same time infusion of fluids to replenish nutrition and physical strength to prevent the dog from dehydration and death.