I wonder about that a lot!
My bp came from a breeder that did not seem very professional...of the hundreds of bp available at that expo, I picked the one that stood out as different...after a couple of weeks of scouring the web I've determined he prolly normal...but that's the mystery of genetics! No tellin what's hiding on the inside!
I like to hope these traits I picked him for might just be something genetic...if only het. markers...that would be great too!