Canine distemper: what it is and how vaccination helps prevent it
More than a respiratory illness
Canine distemper is a contagious viral disease that can affect a dog’s respiratory, digestive and nervous systems. Contact with secretions from infected animals can spread it. Fever, eye or nasal discharge, coughing and lethargy may occur; neurological signs such as involuntary movements or seizures can also develop.
Dogs do not all show the same signs, and other diseases may look similar. The appearance of a discharge or an isolated video is not enough to confirm the cause.
Vaccination is preventive
Protection against distemper is included in combination vaccines for dogs. The veterinarian reviews age and history when planning doses and boosters. Vaccination does not clear an established infection or replace assessment of a sick dog.
For neurological signs or difficulty breathing, seek immediate care. If you suspect a contagious illness, tell the centre before arriving and avoid contact with other dogs while you wait for instructions.
History to gather
Check the complete vaccination record, not only the most recent date written down. When arranging a visit, distinguish what is documented from what you have been told about earlier vaccinations. If your dog came from another home or a shelter, ask what records can be provided.
Write down what you want to review during the visit: what protection is recorded, whether information is missing and how to arrange the next appointment. If you are requesting care because of current symptoms, explain that at the outset instead of describing it as routine vaccination.
How Reinavet appointments work
Visits are arranged by appointment and availability must be confirmed. Messaging is for organising care; it is not an on-call service and does not guarantee immediate assessment. When an animal needs an emergency centre, waiting for a scheduled home visit may delay necessary care.
Keep exploring
Learn about the canine combination vaccine and read the canine parvovirus guide. To review a dog’s preventive plan when there is no current emergency, ask about an appointment.
Source
Merck Veterinary Manual: Canine Distemper. Accessed 20 October 2026. Educational information; it does not replace a veterinary assessment.