Critics of the food industry refer to commercial food making facilities as factory farms. That term has certainly crept into common usage. The industry -- government regulators included -- dislikes this expression and categorizes farms by size. The overall term is AFO, or Animal Feeding Operation, a subset of which are CAFOs, or Confined Animal Feeding Operations. I recommend the wikipedia sites: AFO, CAFO, and Factory Farming.
Government regulation can be under the Environmental Protection Act (Clean Air and Clean Water), through local zoning laws, and by way of suits brought by neighbors. It is immediately apparent that large farms are regulated more than small farms -- somewhat contrary to my argument in the previous blog. Nevertheless, large farms dominate the market. It may be that "organic" farms and other operations seeking to distinguish themselves from factory farms, are careful to stay under the size that attracts regulation. There are more small farms than large ones, but the bulk of what we eat comes from large farms. For example, there were once one million pig farms; 80,000 now accommodate as many pigs as those million did.