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Rumen Health Technical Guide
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Bloat is an over distention of the rumen with the gases of fermentation.
Intensively fed cattle typically have a high proportion of cereals in their diet, which quickly produces gas during digestion.38ReferenceView allGalyean M. L. and Rivera J. D. 2003.
Nutritionally related disorders affecting feedlot cattle. Can J. Anim. Sci. 83: 13–20. 39ReferenceView allWang Y., Majak W., McAllister T. A. 2012.
Frothy bloat in ruminants: Cause, occurrence, and mitigation strategies. Anim. Feed Sci. Technol. 172 : 103-114.
Cattle on these diets are not able to expel gas fast enough during rumination, due to the small quantity of long fiber in the diet.
The foamy substrate is comprised primarily of polysaccharides secreted by rumen bacteria and released from disrupted bacterial cells. This happens when large populations of bacteria die in a short period of time.
More efficient rumen fermentation means less energy is wasted as methane and also less protein is lost as ammonia.