309 – Role of Feed Processing on Gut Health and Function in Pigs and Poultry_ Conundrum of Optimal Particle Size and Hydrothermal Regimens (Research paper – Kiarie – 2019)Click here for resource
In Significant Impact Groups: Feed / gut health \ Feed composition
Species targeted: Pigs; Poultry;
Age: Not stated;
Processing livestock feed influences gut health/function, efficacy of feed enzymes and nutrient availability. Finer feed particles allow better absorption of nutrients (increased surface area allowing better contact with digestive enzymes) and enhance animal performance. There is a limit to the particle size; very fine particles negatively affect gut health, i.e. stomach ulceration in pigs and gizzard dysfunction in poultry. Coarse particle size increases stomach and hindgut acidification, which may be beneficial in controlling overgrowth of gut bacteria, such as salmonella and E. coli. However, since most commercial pig/poultry diets are subject to heating to reduce levels of feed-borne bacteria (e.g. Salmonella) reduction of feed particle size is inevitable. However, achieving high nutritional quality and processing at high temperatures does not favour high nutrient availability and stability of heat sensitive enzymes. Therefore, feed processing balance maximum nutrient utilization, feed hygiene status, stability of enzymes post-processing and impact on gut health.