How do they know?

My son travels home from college today for the Christmas break. I have been telling Blue for several days that his boy is coming home soon and I reminded him yesterday when I told him good night. This morning he was perkier than I've seen him in quite some time, almost like he was quivering. I told him the boy was coming home today and he did that little prance-thing he always does when he's waiting to be fed. He will be so happy!

Their own special language going on the end of this past summer.