The Yorkshire Terrier is one of the smallest dog breed of terrier type, and of any dog breed. The breed developed during the 19th century in Yorkshire, England. The coat might get knotted if not brushed daily. In order to prevent breakage, the coat may be wrapped in rice paper, tissue paper or plastic, after a light oiling with a coat oil. The oil has to be washed out once a month and the wraps must be fixed periodically during the week to prevent them from sliding down and breaking the hair. Elaborate coat care dates from the earliest days of the breed. Elaborate coat care dates from the earliest days of the breed. In 1878, John Walsh described similar preparations: the coat is 'well greased' with coconut oil, the dog is bathed weekly, and the dog's feet are 'carefully kept in stockings'. Like other small breeds, Yorkies are also prone to severe dental disease.