The technical name for bloat is "Gastric Dilatation-Volvulus" ("GDV"). Bloating of the stomach is often related to swallowed air (although food and fluid can also be present). It usually happens when there's an abnormal accumulation of air, fluid, and/or foam in the stomach ("gastric dilatation").

bloat chart

Bloat Studies and Research

Bloat and Genetics

Tuft's University

Retrospective Bloat Survey

Purdue University

Bloat Research Initiative

AKC Canine Health Foundation