Will The FDA Act?

Dr. Robert Lawrence works over the animal agriculture industry:

The media's coverage of the decision has focused on the use of antibiotics for growth promotion. While ending these uses would be an important step, it would not be sufficient to end the misuse of antibiotics in industrial food animal production. As long as low doses of antibiotics may be continuously fed to food animals to prevent disease, the industrial operations that produce the majority of food animals in this country will continue to serve as giant incubators for antibiotic-resistant bacteria.
It is unclear whether the FDA still considers the use of antibiotics to prevent disease safe. The agency has acknowledged that feeding antibiotics to entire herds or flocks, for disease prevention and other purposes, "poses a qualitatively higher risk to public health" than treating individual sick animals. the FDA has nevertheless termed the preventive use of antibiotics "necessary and judicious."
The use of antibiotics for disease prevention is only necessary because companies have chosen to raise food animals using methods that make them especially susceptible to infectious diseases. If we improved the diets and living conditions of the animals, we could prevent disease without compromising the effectiveness of antibiotics and putting the health of the public at risk. This is how Denmark ended the misuse of antibiotics in 2000 -- over strenuous objections from the Danish swine industry -- and remained the world's top exporter of pork.
How we use antibiotics, in animals as in humans, will determine the rate at which infections become resistant to antibiotic treatment. If we take steps now to ensure responsible use of these drugs -- including a ban on their use for growth promotion and disease prevention at industrial farms -- we can slow the rise of resistance. The recent court decision offers hope that this is possible. We now must push the FDA to comply with the decision and to extend the logic of the ruling to other antibiotics. We do not have much time.

Again, farmers really need to get ahead of this.  Dragging their feet and hoping nothing bad happens isn't a good strategy.