Dogs suffering from parvovirus will have a fever. However, not all dogs suffering from parvovirus will have a fever. The common symptoms of parvovirus are loss of appetite and low energy. Diarrhea usually occurs 24 hours later, and there may even be symptoms. Sometimes there will be repeated violent vomiting, accompanied by thin feces. In severe cases, the dog's feces will contain blood. It is worth noting that whether a dog has a fever or not cannot be used as a criterion for whether a dog has parvovirus. It must be judged in conjunction with other clinical symptoms. Therefore, once the owner finds something strange in the dog, it is best to take it to the hospital for diagnosis.

Judgment criteria for small dogs:

1. Clinically, dogs have vomiting, diarrhea, lack of energy, and fishy stools.

2. The small test paper shows red or a dark red line.