What It Means to Love a Dog

My mom died six years ago, a few hours after I sat on the edge of her bed at her nursing home in Georgia and talked with her for the last time. My wife, Alix, and I were staying with my brother and his wife, who lived just down the road. My brother got the phone call not long after midnight. He woke me up, and we went down to the nursing home and walked the dim, quiet hallway to her room. She was in her bed, cold and still. I touched her face. But I didn’t cry.

Two years earlier, the veterinarian had come to our house in Charlotte...