A couple wake to find a gray fox sitting calmly in their driveway, and they read it as a sign that they belong on the mountain. They are already planning how to tell the story. Later the same day, the fox is stumbling in circles in a field, foam on its muzzle, and they realize it is rabid. Its tameness was never friendliness, only the disease stripping away its wildness.
The speaker's feelings shift with the scene. There is the pleased, slightly smug glow of "chosenness," then horror, then a grim kind of duty. He watches the dying animal as long as he can bear to, and admits he is probably just another torment to it. When he shoots it, he finds the death almost "refreshing," because the world has gone back to the order he expected. The mood is quiet and unsettling, and the careful burial under a wild cherry tree adds a note of respect. The poem punctures the human habit of finding messages meant for us in nature.