Now this is my 2025 brain trying to recall 1985-86 memories when I worked there so that sets a certain bar of accuracy. We had a walk in cooler and it was a first in first out kinda deal. First in was frozen on the left side and it would work it's way to the right where it would be thawed ....or mostly thawed. Picture stacks of plastic totes full of bags of chicken. Pretty sure those would then go out to the kitchen by the bag and put in the fridge that was out by the prep table. It would be hard to run out of chicken altogether but I could see them getting to where they ran out of thawed chicken.