GDV (Gastric Dilatation and Volvulus), also known as bloat, occurs when the stomach fills with air and rotates on its axis. This is a fatal disease without treatment. Signs can be somewhat vague--anorexia, lethargy, sudden collapse, vomiting, and a distended abdomen. This is an emergency; seek immediate veterinary attention if you think your dog has bloat. Initially your veterinarian will do a thorough examination and take abdominal x-rays. This will confirm diagnosis and treatment can begin.