Rabbi Avrohom Gordimer discusses the subject of modern-day milk factories. He begins by discussing the milking process at the farms highlighting some of the differences between the U.S.A. and Europe (robotic milking). He then illustrates the process at the dairy processing facility (pasteurization etc.). He also discusses how Cholov Yisroel mashgichim deal with the famous issue of D.A. (displaced abdomen) and some procedures that may make the cow into a treifa.  Also discusses various psakim from Rav Belsky and Rav Shimon Schwab as to how long the mashgichim have to be present.