Can canine distemper spread to other dogs?

Yes. Canine distemper is highly contagious and spreads through respiratory droplets and direct contact. Any dog that has been in contact with an infected animal should be reported to your vet for isolation assessment and testing.

How is a canine distemper infection confirmed?

Your vet will combine clinical signs with PCR testing or antibody serology to confirm infection. Imaging or blood tests may also be performed to evaluate for complications.

What should I do first if my dog starts vomiting?

First, record how often your dog vomits and what the vomit looks like, take their temperature, and capture photos or a video for your vet. If vomiting is frequent or accompanied by fever, seek veterinary care promptly.

How can canine distemper be prevented?

Keeping vaccinations up to date is the most important preventive measure. Avoid contact with unknown or potentially sick dogs, and consult your vet promptly if you suspect exposure.

How much do the tests and treatment usually cost?

Costs vary by clinic and region — ask your vet for an estimate before proceeding.

Disease Guide

Canine Distemper in Dogs: Symptoms, Diagnosis & Care [2025]

Canine distemper is a serious viral infection affecting the respiratory, digestive, and nervous systems; prognosis is guarded, and prevention is the best approach.

Take 1 minute to check the symptoms first

Last updated: 2026/01/05

Pethealthmap Editorial Team

Sources: AVMA, WSAVA, National Taiwan University Veterinary Hospital

When to See a Vet

Seek emergency care immediately

•Persistent, uncontrollable generalized seizures
•Rapid breathing accompanied by obvious stridor
•Sudden loss of consciousness or unresponsiveness

Schedule a clinic visit soon (within 24–72 hours)

•Sustained high fever lasting more than two days without improvement
•Frequent vomiting or persistent diarrhea with signs of dehydration
•Lethargy, significantly reduced appetite, or inactivity

01What symptoms indicate something is wrong?

Canine distemper commonly affects the digestive, respiratory, and nervous systems. Early signs may be non-specific; seizures or gait abnormalities can develop as the disease progresses.

Marked decrease in appetite or complete refusal to eat
Frequent vomiting or persistent diarrhea with changes in stool consistency
Recurrent fever with noticeably elevated body temperature
Seizures or involuntary muscle tremors
Unsteady gait with noticeably reduced coordination
Depression, lethargy, and unusual weakness

Seek emergency care immediately if you notice the following symptoms:

⚠️ Continuous, uncontrollable whole-body seizures
⚠️ Rapid breathing with audible stridor or wheezing
⚠️ Sudden collapse or loss of consciousness with no apparent response

02How to assess the situation at home: key observations and emergency criteria

Observing and documenting details at home helps your vet quickly assess the condition and stage of illness.

Record the onset time and the sequence in which each symptom appeared
Take your dog's temperature at the same time each day and record the readings
Note the number of vomiting episodes, characteristics of the vomit, and stool appearance
Film any seizures or abnormal gait on your phone for the vet's review
Track daily changes in appetite and water intake
Inform your vet of any contact with sick dogs and your dog's vaccination history
Contact your vet immediately to arrange an urgent visit if symptoms worsen

03How will the vet make a diagnosis? Common diagnostic tests

At the clinic, the vet will use physical examination together with laboratory and imaging tests to confirm or rule out infection and complications.

Physical examination

assessing mentation, breathing, and neurological signs

Blood tests

complete blood count (CBC) and biochemistry panel to evaluate overall health

PCR (viral nucleic acid test)

to confirm viral infection

Serology (antibody testing)

to determine the stage of infection

Chest X-ray

to evaluate for secondary pulmonary infection or fluid

CT or MRI when needed to assess central nervous system involvement

Seek a veterinary facility with PCR testing capability for sample collection

04Treatment and home care after diagnosis: medications, diet, and nursing guide

Canine distemper is managed primarily with supportive care, focusing on stabilising vital signs and treating secondary infections, with regular monitoring of clinical and laboratory data.

Supportive care: intravenous fluids, anti-nausea treatment, and nutritional support
Antibiotics as prescribed to control or prevent secondary bacterial infections
Oxygen therapy or other respiratory support when required
Follow up at scheduled intervals for blood tests and clinical monitoring as directed by your vet
At home, isolate your dog, prevent cross-infection, and keep them warm
Specialist referral or hospitalisation is recommended if the condition is complex or deteriorating

05What to prepare before your vet visit: key information to help your vet quickly identify the cause

Prepare a written log of when symptoms began and how they have changed

List all current and recent medications or supplements

Bring photos or short videos of any vomiting or abnormal stools

Bring your dog's complete vaccination records and a note of any recent animal contact

Use a secure carrier and bring a towel to keep your dog stable and warm

This content is for reference only and cannot replace a professional veterinary diagnosis. If your pet shows signs of illness, please seek veterinary care promptly.