Informative and witty, "Sad Animal Facts" will make you sob with laughter. All these facts have something to answer for sarcastic animals - and they will not spare you. Did you know chipmunks don't recognise themselves in the mirror, octopuses don't have friends and zebras can't sleep alone? As carefree as our four-legged friends may seem, their lives are as complicated and harrowing as ours.