Illness: This highly contagious viral illness manifests in two forms — intestinal and cardiac. It attacks reproducing cells, such as those lining the gastrointestinal tract.
Symptoms: Diarrhea, vomiting, dehydration, abnormal odors
Who's Affected & Why: Parvo can affect dogs of all ages, but it occurs mostly in puppies from 6 to 20 weeks of age. As far as breeds go, Doberman Pinschers and Rottweilers acquire the infection more easily than others.
How to Prevent & Cope: Proper vaccination is the key to preventing Parvo. Puppies should be vaccinated at six, nine and twelve weeks. They should also not be allowed outside until at least two weeks after their last vaccinations. Dogs with the disease should be brought to a veterinary hospital immediately. (petMD)