The manufacturer must have at his disposal a quality control laboratory having adequate staff and equipment to guarantee and check that the compound feedingstuffs containing premixtures comply with the specifications defined by the manufacturer and which will guarantee and check, in particular, the nature, content and homogeneity of the additives concerned in the compound feedingstuffs, and as low a level as possible of cross-contamination, as well as, in the case of feedingstuffs to be put into circulation, the contents as regards analytical constituents (Directive 79/373/EEC).
Proizvajalec mora imeti dostop do laboratorija za kontrolo kakovosti z ustreznim osebjem in opremo za jamstvo in preverjanje, da krmne mešanice, ki vsebujejo premikse, izpolnjujejo specifikacije, ki jih je določil proizvajalec, ter zlasti za jamstvo in preverjanje narave, vsebnosti in homogenosti ustreznih dodatkov v krmnih mešanicah ter za zagotovitev kar najnižje možne stopnje navzkrižne okužbe, pri krmilih za distribuiranje pa tudi vsebnost glede analitičnih sestavin (Direktiva 79/373/EGS).