Distillers Feeds as Protein Supplements in Concentrate Mixtures for Milking Cows

The results of experiments comparing corn distillers dried grains with solubles, corn distillers dried solubles, rye distillers dried grains with solubles, and a mixture of corn gluten feed and solvent extracted soybean oil meal as the principal protein supplement to barley and oats for milking cows have recently been published by Loosli et al. (3). From these studies the authors suggested that the corn gluten feed-soybean oil meal mixture was not as efficient for milk production as was the corn distillers dried grains with solubles. The corn distillers dried solubles and rye distillers dried grains with solubles were essentially equal to the corn gluten feed-soybean oil meal combination. Since the corn distillers dried grains with solubles were somewhat, though not significantly, better than corn distillers dried solubles, it seemed important to expand the study and compare directly corn distillers dried grains with these other distillers feeds.