80% of the antibiotics sold in the US are ingested by animals: http://www.wired.com/wiredscience/2010/12/news-update-farm-animals-get-80-of-antibiotics-sold-in-

80% of the antibiotics sold in the US are ingested by animals: http://www.wired.com/wiredscience/2010/12/news-update-farm-animals-get-80-of-antibiotics-sold-in-us/ http://www.wired.com/wiredscience/2010/12/news-update-farm-a... It lowers the cost of food production but also lowers the effectiveness of those antibiotics in humans and creates drug resistant bugs.