Understanding the differences between extrusion and expansion

While both rely on heat, moisture and mechanical pressure, their effects on feed ingredients and final product characteristics are distinctly different.

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Tim Wall

As feed processing continues to evolve into a precision tool of nutritional optimization, understanding the techniques available becomes essential — not only for nutritionists, but also for mill operators and livestock producers.

Two such techniques, extrusion and expansion, are often confused or used interchangeably. Yet, while both rely on heat, moisture and mechanical pressure, their effects on feed ingredients and final product characteristics are distinctly different.

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