I am deeply troubled by the increasing call to eliminate the use of antibiotics to prevent disease in animals. As a veterinarian focused on the health of animals, I can say without question that if we lose the ability to use antibiotics for prevention purposes, more animals will die.
Animals raised for food live in herds or flocks, share water and feed troughs, and seek close contact with one another by licking, laying on each other and even rubbing snouts and noses. This can spread illnesses rapidly. Waiting for animals to show symptoms of an illness before beginning treatment is often too late. Swift action can prevent the spread of disease and result in animals receiving fewer antibiotics than they would have had they not received preventive medication.