CDV spreads like a common cold. Some dogs may not have any noticeable symptoms.
Infected dogs spread the virus through close contact with other dogs, so group settings present a higher level of risk. When the infected dog sneezes or coughs, dogs in the area are exposed to the virus.
Dogs also can be exposed through contact with urine, feces, vomit or saliva, or through contact with contaminated objects, such as shared water bowls and grooming tools.