On a trip to Maine, my wife and I saw more dead animals than live ones. I became morbidly fascinated by them. That smudge on the road was amphibian, I would think, his cold humor drawn to the stone warmth of highway on a passionate night. Overturned, an ottoman would aim its wooden legs like this dead possum. The immigrant coyote? A wild rug flung on the carpeted ditch. And all those raccoons, their comic bandit role forgotten in these deathbed scenes.

One freezing Monday in January, I stopped at the big box pet emporium to buy my dogs their kibble and treats. As I stepped out of the car I saw a white mutt standing about thirty feet away, surveying the parking lot with that mixture of confidence and wariness that is the hallmark of long-term strays. I called him. As I expected, he acknowledged me but kept his distance. Dogs that are newly lost will either come straight to you or run away in a panic. This guy was clearly hardcore homeless.