Abstract: To understand the current situation of laboratory animal feed quality in China and
provide the basis for standardizing laboratory animal feed production. Method Five feed companies with
high market share and strong representativeness were selected to produce laboratory animal feeds, and the
conventional nutritional components of the feeds were determined and compared by the national standard
method. Result There were significant differences in the routine nutrient contents of rat breeding
material, monkey maintenance material, dog material, rabbit material and guinea pig material produced
by different companies, and the contents of feed moisture, crude protein, calcium and phosphorus met
the national standards. The rat breeding material, monkey maintenance material and rabbit material
produced by individual companies had ash, excessive crude fiber content and low crude fat content. In
addition, the detection rate of unqualified trace element content in the five feeds was high, mainly the
iron and iodine contents. Conclusion The conventional nutrient quality of different experimental animal
feed manufacturers can basically meet the national standard requirements, but lack of monitoring of trace
elements and other indicators, resulting in high product failure rate. Therefore, it is also necessary to
strengthen and improve the construction of feed standardization system and quality control supervision and other key links to ensure the standardization and standardization of laboratory animal feed.

Key words: laboratory animals, formula feeds, conventional nutrients, trace elements;feed standardization

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