Distemper is a viral disease that primarily affects dogs and some other animals, such as ferrets and wildlife. It is caused by the canine distemper virus (CDV), which attacks the respiratory, gastrointestinal, and nervous systems. Symptoms can include fever, coughing, vomiting, diarrhea, and neurological issues like seizures. The disease is highly contagious and spreads through respiratory droplets or direct contact with infected animals. Vaccination is the most effective way to prevent distemper, and it is typically included in routine puppy vaccinations. Early detection and supportive care can improve the chances of recovery for infected animals.