The hot mash moves from the conditioner to the expander. The conditioning and expander process gelatinizes the starch and modifies the physical properties of the feed which enhances the indigenous binding capabilities of the ingredients in the formulation. The product then goes through the pellet mill which shapes the product to the desired pellet size. Expanded product runs mush faster and easier through the pellet mill and draws less amperage than in the traditional process. The feed is then run through the cooler which removes heat and moisture from the pellet.
Rations have a lower percentage of fines.
Increased pellet mill throughput. Reduction in the use of binding agents which take up formula space and do not add nutritional value. Liquids, especially fat, can be added at much higher levels in expanded rations. Grains intended for the expander process can be ground slightly coarser. Some European research observed fewer stomach ulcers which may be tied to particle size or increased digestibility.