I've become friends with a guy whose family farms around 10,000 acres, and finishes around 6000 hogs at a time, 3 times a year. He has friends that do chickens, beef, dairy, etc. It's HUGE business.
We were talking a couple weeks ago about hog farming, and recalling that around here, and especially in southern Michigan, it was common to see field after field of the little corrugated hog huts in rural areas. Now it's all CAFO. (confined animal feeding operations).
Long gone are the small producers. That's pretty much how every technology goes. The economics of scale always win.