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Storage of distillers grains plus solubles was studied using 55-gallon barrels to mimic bunker storage. Six different cover treatments were evaluated when wet distillers grains plus solubles (WDGS) and straw were stored, or modified distillers grains plus solubles (MDGS) alone was stored for 60 days in 55-gallon barrels. Covering with plastic minimized spoilage (8%), and plastic or solubles as cover decreased DM loss (3-5%). Barrels filled with WDGS alone and uncovered were evaluated over 140 days of storage. With time, DM loss increased from 5 to 22%, while spoilage increased from 6 to 12%.