Eye color varies from brown to blue, and occasionally eyes of differing color occur; this is usually seen with merles. The ears of the border collie are also variable — some have fully erect ears, some fully dropped ears, and others semi-erect ears (similar to those of the rough collie). Two types of hearing loss occur in the breed. The first type is pigment associated and is found in border collie puppies, although the puppies can have congenital sensorineural deafness from birth as well. These included Hindhope Jed, a black, tan and white born in Hindhope, Scotland in 1895, as well as Maudie, Moss of Ancrum, Ness and Old Bob.