They are known as nature's followers - subservient animals content to fit in with the flock rather than stand out.
But as this video proves, in every family there is always a black sheep willing to go against the grain.
This is the dramatic moment a female shepherd was trampled and then butted into the ground after her flock was spooked by a car.
Believed to have been filmed in Germany, the footage shows a female shepherd leading her sheep down a country road.
But when a car approaches things quickly go wrong as the shepherd's dog gets distracted from its task of controlling the animals.