Where in the intestinal tract does the symbiotic microflora ferment soluble non-starch polysaccharides (NSPs) in brown layers?

The caeca, two blind-ended pouches branching off at the junction of the small and large intestines (ileocecal junction), are the primary site of microbial fermentation in poultry. While the small intestine lacks the enzymes required to break down complex structural fibers, the caeca house a dense, complex population of anaerobic bacteria (primarily Bacteroidetes and Firmicutes). These symbiotic microflora ferment soluble non-starch polysaccharides (NSPs), such as pentosans, beta-glucans, and cellulose, producing volatile fatty acids (VFAs) like acetate, propionate, and butyrate. These VFAs are absorbed across the caecal mucosa, providing up to 10% of the hen's daily maintenance energy and lowering the pH to inhibit pathogens like Salmonella. Disruption of this caecal flora due to dysbiosis results in wet droppings and poor shell quality. Farmers can study gut microbiology in the Poultry Encyclopedia, buy premium prebiotics and probiotics on Poultry Plaza, check layer feed ingredient rates on Poultry Rates, and trade healthy, high-yield flocks on Murghi Mandi.