I thought Chabad eats only Hasidic shechita. That means that they only eat one type of Glatt meat. For example, they will eat Aaron's but not Empire.
I did until I worked as a Mashgiach & saw what politics & what a racket it was.
In America I eat only glatt because no relaible non-glatt exists,but I assure you in Europe Chabad did not eat Glatt as in Europe either it was kosher or it was not.
The whole glatt business amongst Ashkenazim started with the Hungarians after the war & was taken up by others & in America it became the standard in the 70's.
Even when I ate only glatt I ate other glatt besides one shechita as it is politics.
Before the beard cutting of Rabbis Korf & Vechter there was not much Lubavitcher shechita other than small amounts of chicken after the Satmars attacked them,beat them & cut their beards did this start & Aaron's did,'t start until the late 80's early 90's.
Many shluchim outside Brooklyn east Empire chickens as they are easier to get & just as kosher.
Some of the shochtim for Empire are Chabadniks.