What is TDN and How is It Calculated? A Guide for Animal Nutrition
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3 min read
Over 100 years ago, the TDN system was developed as a metric for estimating the energy value of feedstuffs, and it remains a commonly used tool in livestock nutrition today. Total Digestible Nutrients (TDN) represents the sum of all digestible nutrients within a feed, providing a valuable estimate of the energy an animal can derive from its diet.
