I’ve always wondered how the sun can continue to shine, birds and crickets sing, and people go on about their business when we feel the sting of the death of a loved one.  Our chocolate lab, Lexington, isn’t lazing on the cool porch beside us as we have coffee this morning. Our oldest son, Calen, asked in the summer of 2008 if he could rescue a young puppy whose family had a new baby and couldn’t keep the pup anymore.  He asked our permission because there was talk of him shipping off to Iraq with the Army Reserves, and we all knew who would really have puppy duty.  He was…