Thousands of dogs get the canine parvovirus each year. Of those, 15% will die. Without treatment, 100% will die. Here’s what you need to know about dog parvo disease including: the symptoms of parvo, how it’s spread, and the treatment for parvo. If you suspect that your dog is suffering from parvo, take your dog to the vet right away! Most deaths from the canine parvo virus occur within 48 to 72 hours.