I think for a lot of the stretching things, you are using the meat IN a dish, not as the main dish itself. Also, keep in mind a "serving" of meat is four ounces. If I'm making a meal, I've got other dishes being served with that chicken, so eating one piece of chicken is not unreasonable if we also have a salad, and a starch, and a vegetable. If you make a chicken pot pie that has eight servings, you aren't using eight whole servings of chicken in it, because there are other things in it bulking it up. When I make chicken tenders out of two chicken breasts, there is enough for my family of three to eat dinner and then have enough for both DH and I to have some for lunch the next day, so we get five servings of chicken out of two breast-halves.