After a dog gets parvovirus, it is not serious and it is a sign of improvement, because parvovirus can cause severe dehydration in dogs. When the body begins to adjust and recover, the dog will have the urge to drink water, so this time you can Let the dog drink some water appropriately to help the dog replenish water. The third to fifth days of parvovirus are the most serious. If the dog can persevere, it will begin to recover, so pay more attention to the dog’s condition in these days and actively treat it.