Nutrition and Feeds Feed Preparation Is it profitable to grind, crush, or soak feed? When animals fail to chew the grain thoroughly some of the nutritive value of the feed is lost because of the reduction of surface area. Fineness of Grain - Why? It should be ground to medium fine. For swine, it should be ground more finely (Aver. particle size of 700-800 microns) Extremely fine grinding takes more power, time, and the process can make grains less palatable. Wheat and barley which is ground too fine could be wasted (lost as dust) and/or cause digestive problems. Rolling vs. Grinding Grain For monogastrics, rolling grain results in a more uniform particle size which improves digestibility. Rolling grain is more energy efficient than using a hammer mill or grinder. Advantage of Pellets Less waste Less space needed for storage Animals may eat more feed in pellet form Chopped or Ground Hay Advisable only if it encourages animals to eat coarse, stemmy portions that might otherwise be left. 100% Concentrate Not advisable because of digestive troubles in animals, especially ruminants Cooked Feed Advantageous when feeding potatoes, field beans, and soybeans. These feedstuffs must be cooked to remove factors which cause poor performance in swine. Cooking does not increase the digestibility or feeding value of other feeds. Soaking Feeds Advantageous when grain with small or hard kernels cannot be ground or crushed If soaked too long, fermentation may take place or mold will grow which produce toxins. Fermenting of Feeds Experiments show these methods of feed preparation do not cause any saving in feed or result in greater production.