On Sunday, after attending the opera, I came home to find that my newly-acquired dog was nowhere to be found. She had been securely shut in the house and had dog door access only to the well-fenced back yard. As I had had her for less than 24 hours, she did not yet have dog tags and was not chipped. She comes obediently when called, but didn’t. My heart was in my mouth as I searched—the path where we had walked that morning; all around the property.…