The grain feed or granular compound is heated in a high temperature of 160-187°C for 1-2 minutes to heat the moisture inside the grain to the evaporation point, so that the grain feed expands and the volume increases by 30%-40%. Then crush the chicken. Tests have reported that feeding extruded chicks can increase feed utilization. After soaking in the grain feed for a night, it germinates at a temperature of 20-27°C in a dark place, which can make the starch saccharification, increase the content of protein and soluble B vitamins, and improve palatability. Allegedly, the addition of germinated barley in the winter can increase chicken egg production by 10%-12%. It has been reported that normal sorghum lacking lysine germinated at 30°C for 3-4 days, and lysine, methionine, and tryptophan in sorghum increased by 2.2, 1.8, and 5.7 times compared with those before germination, respectively. Beans, potatoes, cereals (for ducks) and animal feeds (such as quail, raw fish, etc.) can be cooked to increase palatability, ease of digestion, and kill harmful germs. However, the feed cooking time is too long, protein coagulation is not digestible, vitamins are destroyed, but the nutritional value is reduced. Therefore, whether cooking depends on the specific circumstances. The cottonseed cake can be covered in a pot with a closed lid, cooked until the cottonseed cake turns brown, squeezes moisture, and achieves the purpose of detoxification. The rapeseed cake can be roasted and the feed scented to promote the appetite of the chicken, and the bacteria and mould hidden in the feed are killed. The roasted rapeseed cake, the melanin and the white mustard are destroyed, thereby increasing the feed value of the rapeseed cake.
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