Gastric Dilation Volvulus (AKA:Bloat, gastric torsion, GDV).
Large, deep-chested dogs are predisposed to this condition where the stomach
rotates around itself. Risk factors associated with this condition include
stress, once a day feeding, dogs that eat too fast and/or exercise after
eating.
The signs of bloat include abdominal distention, abdominal pain,
salivation, retching and/or vomiting. If your dog shows these clinical signs,
immediate veterinary intervention is necessary and surgery to return the
stomach to a normal position.

Dr. Leo Londono D.V.M.- HAH
University of Florida