The antibiotics given to livestock amount to tons every year. If these drugs were administered to help the animal recover from illness or injury, I could see it. But that’s not the case. In many confined animal feeding operations, antibiotics are mixed with the daily feed in order to prevent illness due to crowded conditions, and to boost animal growth.
What does that mean for us?

Dr. Gail Hansen, a senior officer for Pew’s campaign on human health and industrial farming

Sylvia