This occurred a week or so ago. Katie Couric did a story on the use of antibiotics on factory farms in the US and the potential harm to humans. Unfortunately, I missed this series as we don't watch network television. A friend of mine said it was quite good. According to her, there was a message that removing the use of antibiotics would actually improve these poor animals' welfare.
Here is an article about the series. Of course, the question remains as to whether these animals should be in these factory farming conditions in the first place, regardless of antibiotics' use. And, of course, the focus is on the impact on humans. But I'm glad they took the time to look at this. Apparently, it was NOT flattering to big ag.