Without treatment, Parvo survival rates are very low. Infection causes massive slouthing of the lining of the intestinal tract. This results in haemorrhage, malnutrition, severe dehydration, and bacteria and toxins being released into the circulation. With prompt diagnosis, hospitalisation and aggressive treatment, survival rates are much greater. Signs of Parvo virus infection are lethargy, foul smelling soft faeces progressing severe bloody diarrhoea. If you suspect your dog has parvo you should seek immediate veterinary attention.