Dog hiccups occur when the diaphragm involuntarily contracts. The diaphragm—a dome-shaped muscle separating the chest from the abdomen—usually works smoothly during breathing. However, occasional irregular contractions cause those characteristic jerky movements. During hiccups, the diaphragm suddenly contracts while the glottis (the opening of the airway) simultaneously closes, creating that distinctive ‘hic’ sound. This biological response […]
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