Think twice before you head out into the sheep pasture next time. The seemingly harmless sheep is perhaps not as timid as they seem. In fact, even domesticated many times they can demonstrate wild instincts. Domestic species are complex social beings who, despite having lived as domestic animals for thousands of years, are still much closer to wild animals than you may think. Desmond Morris (an expert in both human and animal behavior) shows how they defend their territory, attacking predators, play dead and battle for supremacy - out on the seemingly idyllic green fields surrounded by fences.