The Old English Sheepdog (OES) is a large breed of dog that emerged in England from early types of herding dog. Obsolete names for the breed include Shepherd's Dog and bob-tailed sheep-dog. The nickname Bob-tail (or Bobtail) originates from how dogs of the breed traditionally had their tails docked. Old English Sheepdogs can grow very long coats with fur covering the face and eyes and do not shed unless brushed. The preferred method of grooming involves starting from the base of the hairs to keep the thick undercoat hair mat- and tangle-free. The brushing should be started at a very young age to get the dog used to it. A hairband may be used to keep a dog's fur out of its eyes. Many people trim their dogs' coats to a more manageable length. A professional quality electric shear reduces time spent trimming. However, dogs that are being shown in conformation must retain their natural coat.