The document recommends buying a dog if you want a companion that will bring you the newspaper without tearing it, make a fool of itself to make you happy, eat whatever you feed it without complaint, go anywhere with you at any time, watch movies with you without touching the remote, warm your feet in bed without criticism, and love you unconditionally. However, it recommends buying a cat if you want a pet that will ignore you when you call, not greet you when you come home, leave hair everywhere, walk all over you, be active at night only coming home to eat and sleep, and act like you exist only for its happiness.