1. Soybeans include soybeans and black beans. Raw soybeans contain three kinds of harmful substances. One is antitrypsin, which inhibits proteases from decomposing proteins. The other is phytohemagglutinin, which reduces blood cells and reduces heme levels. The role; third is urease, there is decomposition of protein and urea ammonia, stimulate the role of the digestive tract. Second, pea peas contain anti-trypsin and fenugreek alkaloids and other harmful substances, the former harm with soybean; the latter has adverse effects on the damage of the central nervous system, heating can eliminate the harm. Third, rapeseed cake contains sulphur gluconate and more tannins in non-detoxified rapeseed cake. The former, under the action of mustard enzyme, can hydrolyze isothiocyanate, which can cause goiter; the latter can reduce the palatability of feed and cause constipation. Fourth, potato tubers, stems and leaves contained in the toxin called solanine, also known as potato or solanine. Mature tubers contain little poison, but when germinating, they are particularly toxic on the blue-green skin of tubers. The buds and buds contain the most toxic substances. When feeding, these pieces should be removed from the tubers that have germinated or become green and purple in the skin. The remaining tubers are soaked in water and cooked, and the cooked water is discarded. Guangzhou Zhongzhinan Supply Chain Co.,Ltd. , https://www.zhongzhinanlighting.com