Whenever I have cereal in the morning, an interesting thing happens.  I have a cat who is 18 years old.  As soon as she hears me open the cereal box, she begins to meow because she knows milk is involved.  Just opening the box – not even pouring the cereal or pouring the milk.  She instinctively knows something good, something that she loves, is to be had.  I pour the milk and go into the living room to sit in my armchair and watch the news.  She immediately jumps up on the right arm of the chair and starts meowing and pawing at the cereal bowl.  She knows that I…