How long is dog pneumonia contagious?

Dog pneumonia, particularly if caused by infectious agents like bacteria or viruses, can be contagious. The duration of contagiousness varies depending on the underlying cause, but generally, a dog may be contagious for several days to a week after showing symptoms. It's important to keep infected dogs away from other dogs during this period to prevent the spread of infection. Always consult a veterinarian for specific advice and treatment.