 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 . Following the programme , the RSPCA ended its sponsorship of the annual Crufts dog show , and the BBC declined to broadcast the event . 
