When antibiotics were first used in feed they worked and everyone had confidence in them.
Many years later antibiotics are being blamed for all sorts of things and the discovery of ever increasing numbers of antibiotic, and multiple antibiotic strains of bacterial pathogens required Governmental intervention.
Murray Hyden, Director of Biosecurity at Optivite Ltd in the UK for AllAboutFeed further elaborates on this subject.
Although it focuses on the organic acids products supplied by the company it is still an interesting article to read. You can read the full article
HERE.