For the utilization of feed plants by various farm animals, their material composition and microbiological status (feed hygiene) are important in order to meet the animals' needs. The exact analysis of feed using different methods is evaluated here as well as the effects of environmental and management factors on individual quality parameters. In addition to the classic tests (Weender nutrient analysis, structural substances, quantitative and trace elements), the HBLFA Raumberg-Gumpenstein uses special methods to determine quality (in vitro digestibility, protein fractionation according to CNCPS, etc.). Organoleptic feed evaluation methods such as sensory evaluation of basic feed are being further developed for practical operations.