I have called Kraft once in question of what enzymes were used in their cheddar cheese. The person on the other end seemed to think I was ridiculous for asking and suggested that there was no way to tell. Frustrated, the call ended.
I have since gone to Kraft's website to find that they use very specific enzymes in their different cheeses.
I was curious which enzymes were used in their Velveeta (specifically asking which animal). The first response told me, "Yes, we use animal enzymes," a form response, actually, that I had already read from their website. I rephrased the question, minimizing the number of questions (as I had asked a few), and the response I received only went into MORE depth on how cheeses are made. In honesty, I probably would not have been concerned with which enzymes were used (or even known that cheese requires enzymes) if I had not already known how cheese was made.
Needless to say, I am highly disappointed in the customer service quality of Kraft Foods.