OU-D and OU-D Cholov Yisroel

What is the difference between OU-D and OU-D Cholov Yisroel ?

Milk has Cholov Yisroel status when the milking and bottling is done under the supervision of a reliable Jewish person who ensures that the milk is only coming from a kosher animal.   In general, the OU follows the opinion of Rav Moshe Feinstein zt”l, and others, that government inspection of dairies is equivalent to a Mashgiach’s supervision, whereby the status of the milk from these dairies is halachically equivalent to that of Cholov Yisroel.  Not all Poskim accept the position of Rav Moshe, and those who follow the more stringent opinion should only use OU products which are specifically labeled Cholov Yisroel, an indication that the milking and bottling were supervised by a Mashgiach.