Parvo in puppies is a highly contagious viral disease caused by the canine parvovirus. It spreads through direct contact with an infected dog or by indirect contact with a contaminated object. Puppies are exposed to the virus every time they sniff, lick, or consume infected feces. Parvo is a preventable virus, and all puppies and adult dogs should receive their parvo vaccinations. Symptoms of parvo in puppies include bloody diarrhea, vomiting, fever, lethargy, loss of appetite, weight loss, weakness, dehydration, and depression. A puppy with parvo is a very sick dog, and the sooner you catch the early signs of the virus, the sooner you can get your dog to the vet. Treatment for parvo revolves around supporting the puppy so their body can fight it off, and it generally includes hospitalization with intravenous fluids and antiemetics to stop vomiting. If your puppy or dog shows any signs of parvo, you should contact your veterinarian immediately.