... powerful, with a large black nose and open nostrils. Eyes small and very black, almond shape preferred. The lips should meet as tightly as possible, without a fold. The teeth should be regular in shape, and should meet exactly; any deviation, such as pigjaw, or being underhung, is a great fault. EARS—The ears, when cropped, should be done scientifically and according to fashion. Cropped dogs cannot win a prize at shows held under Kennel Club rules, if born after March 31st, 1895. When not cropped, it should be a semi-erect ear, ... — Dogs and All About Them • Robert Leighton