The manufacture of different types of feed after each other in the same production line may result in the presence of traces of an active substance in the line, which ends up in the beginning of the production of another feed.
D’fhéadfadh sé a bheith mar thoradh ar chineálacha éagsúla beatha a mhonarú i ndiaidh a chéile sa líne tháirgthe chéanna go mbeadh rianta substainte gníomhaí ar an líne a théann isteach i dtús táirgthe beatha eile.