After the dog is suffering from parvovirus, it is constantly looking for water. The owner must not feed it. The correct approach is to stop feeding the dog all food and water. This can reduce the dog's vomiting and blood in the stool and prevent the worsening of the condition. Wait until the dog no longer vomits and the blood in the stool is significantly improved, then feed the dog food and water. If the dog is exhausted during treatment, you can feed the dog an appropriate amount of glucose water to help the dog regain its strength.