Canine parvovirus (CPV) is a highly contagious virus that can cause severe illness in dogs, particularly in puppies and unvaccinated dogs. The symptoms of parvovirus typically appear 3 to 7 days after exposure to the virus and can include:

1. **Severe Vomiting**: Dogs may vomit multiple times a day, often with a yellow or brown color due to the presence of bile.

2. **Diarrhea**: This is often severe and can be bloody. The diarrhea can lead to rapid dehydration.

3. **Loss of Appetite**: Infected dogs may show little to no interest in food and water.

4. **Lethargy**: Affected dogs often become very lethargic and may seem weak or depressed.

5. **Fever**: A high fever may be present, but in some cases, the dog's temperature may drop below normal.

6. **Abdominal Pain**: Dogs may exhibit signs of pain when their abdomen is touched.

If you notice any of these symptoms in your dog, it is crucial to seek veterinary attention immediately. Early diagnosis and treatment can significantly improve the chances of recovery. Vaccination is the best prevention against parvovirus, so ensure your dog is up to date with their vaccinations, especially if they are a puppy or have not been vaccinated before.

Additionally, be cautious in areas where many dogs congregate, as the virus can survive in the environment for long periods and is resistant to many cleaning agents.

This answer doesn't make sense or isn't related to the question. Mark it as a probable hallucination of the AI model.

Topics covered in this question:

Dog Health Puppy Care Dog Symptoms Canine Diseases Parvovirus