Are blocky headed lab and blockhead labrador synonyms? They can't do long division, but they can obey voice, whistle, and hand signals for sit, stay, come, over, and back! Craighorn Bracken lines... just remember that while CB won the British National Championship in 2006, as well as placing 1st runner-up, 2nd, and 3rd in previous years, he was PRA positive. So, along with hip and elbow scores, another screening test for PRA result that should be a mandatory requirement. DO not buy from any breeder who doesn't do extensive health checks, even if they offer a replacement guarantee if the dog proves to be unsound; a health guarantee usually carries with it the stipulation that a euthanasia certificate be submitted to get a replacement pup.