Shortness of breath is not necessarily a symptom of canine distemper in the later stages. This condition sometimes occurs in the early stages. Symptoms in the later stages of canine distemper include body twitching, sudden howling, skin ulcers, foaming at the mouth, and increased eye secretions. , purulent secretions in the nasal cavity, keratinization of the soles of the feet, etc. The onset of canine distemper is very fast, and the mortality rate is relatively high, so once it is discovered, it needs to be sent to the hospital for treatment immediately to avoid delaying the treatment opportunity.