Found this on Bob Clark's site. Not sure if it will take, but I'm amazed that they hooked up. Hmm... wonder what they would be called: "Royal Burms"? "Burballs"? This is being attempted by a breeder in Italy.
BTW, I'm not sure on the rules about posting other peoples pictures here. The picture is plastered with the breeders name, but I would be happy to take it down an provide the link instead.
(edited to provide link)
Ball/Burm Locking up