Since the usual test for protein in animal feed just measures the level of nitrogen, these chemicals can be added to far more expensive feed ingredients without anybody noticing.
因为一般的测定动物食物的测试只测量其中氮的含量，这些化学物质可以被加入昂贵的食物成分中而不为人所知。
The invention also relates to a preparation method for the composition of mixed animal protein and the application thereof in preparation of aquatic animal feed.
本发明还涉及该混合动物蛋白组合物的制备方法及其在制备水产动物饲料中的应用。
The agency has also found melamine in pet food containing rice protein concentrate, and recently began testing animal feed and human-food additives for melamine contamination.
最近，监督局开始对动物喂养和人类食物中的添加剂做三聚氰胺污染的实验。
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