The Working Group is a kennel club designation for purebred dog breeds descended from dogs bred to assist humans with their work. In general the group comprises herding dogs and sled dogs but also search and rescue breeds. It is a large group containing some of the most intelligent and visually appealing dog breeds, which has made them popular. This popularity can lead to their downfall as family pets when purchased by those ignorant of the fact that most will need training and "work" in order to fit into a family setting.