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The Union of Concerned Scientists estimates that at least 70 percent of the antibiotics used in America are fed to animals living on factory farms. Raising vast numbers of pigs or chickens or cattle in close and filthy confinement simply would not be possible without the routine feeding of antibiotics to keep the animals from dying of infectious diseases. That the antibiotics speed up the animals’ growth also commends their use to industrial agriculture, but the crucial fact is that without these pharmaceuticals, meat production practiced on the scale and with the intensity we practice it could not be sustained for months, let alone decades.

In order to help sustain the lives of pigs, chickens, and cattle that live in filth, it is necessary that they feed on antibiotics. In fact, nearly 70 percent of the antibiotics used in America are used to feed these animals. Unfortunately, without the benefits of such antibiotics, our meat production could not possibly keep up with our needs because of how the pharmaceuticals aide in speed growth.