My dog charged toward my two-year-old daughter, barking with his teeth bared… I thought he had turned on her—until I spotted one tiny detail behind her.

The sliding door was open, the sun was warm, and everything felt peaceful. Rex, our German Shepherd, lay under the olive tree, calm and still as always. He had never frightened Mila before. He had never shown his teeth at her, never growled, never turned a deaf ear to my voice.

That was why, when he suddenly leapt up and continue reading …