The varieties of toy spaniel were occasionally used in hunting, as the Sportsman's Repository reported in 1830 of the Blenheim Spaniel: 'Twenty years ago, His Grace the Duke of Marlborough was reputed to possess the smallest and best breed of cockers in Britain; they were invariably red–and–white, with very long ears, short noses, and black eyes.' In 2008, the BBC documentary Pedigree Dogs Exposed was critical of the breeding of a variety of pedigree breeds including the King Charles Spaniel. The show highlighted issues involving syringomyelia in both the King Charles and Cavalier breeds. Mark Evans, the chief veterinary advisor for the Royal Society for the Prevention of Cruelty to Animals (RSPCA), said, 'Dog shows using current breed standards as the main judging criteria actively encourage both the intentional breeding of deformed and disabled dogs and the inbreeding of closely related animals'; this opinion was seconded by the Scottish SPCA.