After all; an open air cesspit of fermenting cow manure, urine, antibiotics, hormones, and anything else they sluice off of the floors of their sheds is a perfect breeding ground for super pathogens. A concoction that is then sprayed, or even injected, all over the rural landscape.
The World Health Organization and the CDC have both expressed concerns about a pandemic caused by modern industrial farming methods; but have always been ignored.
The best part about passing ineffectual regulations is that you can always hide behind the legality of your actions.