 In the 1860s and 1870s, a small group of dog show enthusiasts tried to claim that prick-eared versions of white working terriers were an entirely different breed from those same dogs with dropped ears.The problems with this claim were legion, however.For one thing, prick and drop-eared dogs were often found in the same litter, while entirely white dogs had a propensity for deafness and were therefore nearly useless in the field.