Cheese Dragons are not actually alive. They are enchanted items of food that act almost identically to dragons. They have no need to eat, but they must “live” in humid environments or they will dry out and harden.

BBQ Grilled Sandwich loves to eat grilled sandwiches, especially with cheese! When questioned about the fact that he is a cheese dragon that eats cheese sandwiches, he replies, "I'm not made of cheese, I'm made of a cheese-like material". No dragon has has the heart to point that he is in fact made of real cheese that is actually quite tasty, as some curious dragons have experienced. So BBQ Grilled Sandwich continually eats pounds and pounds of grilled cheese sandwiches every day.