1, control the number of additions, not the more the better. General young birds are more appropriate to add, pig fattening less late; highly cultivated modern varieties should be added, local varieties can be added less. Grain feed-based diets, it is difficult to make high-yield pig poultry enough energy, therefore, adding fat is necessary. The best pig farms and poultry farms to do small batch test, according to the test results, set the added proportion. In the case of
2, to ensure the quality of oil. Must have no smell. To prevent doping, oxidation, denaturation, mildew, toxic and contaminated. Need to add the right amount of antioxidants to prevent rancidity. Commonly used grease antioxidants are BHT (dibutylhydroxytoluene) or BHA (butyl hydroxy anisole), both commonly used, commonly used concentration of 0.005% to 0.02%. But can not use ethoxyquine. Because ethoxyquine is measured in the active oxygen method, it is volatilized before it is oxidized. 3, pay attention to energy than. In the addition of fat to a corresponding increase in the supply of protein and amino acids, to prevent the addition of grease, so that lack of protein and amino acids. 4, add fat, the feed must improve the supply of vitamin B12 and vitamin C, to facilitate the absorption and utilization of fat and improve feed utilization.