There are two types of bloat: gastric dilation and gastric dilatation-volvulus (GDV). Volvulus means twisting of the stomach or the intestine. Information contained herein only briefly touches on this subject. Dogs especially prone to bloat are: deep chested dogs, Mernese Mountain dogs, Setters,Great Dane, Retrievers Labs and Goldens, St. Bernards and Standard poodles.  One of the most important things to remember is: Do not give food within one hour before or after vigorous exercise.  To further research this problem contact your veterinarian or e-mail