The time comes to every dog when it ceases to care for people merely for biscuits or bones, or even for caresses, and walks out of doors. When a dog really loves, it prefers the person who gives it nothing, and perhaps is too ill ever to take it out for exercise, to all the liberal cooks and active dog-boys in the world.

The Confessions of a Lost Dog (London: Griffith & Farran, 1867), pp. 15-16.