Not that I am well versed so much in the dog world, but it was explained like this to me by another very well known breeder & showman.
In the wild the Dad, or Alpha male tends to kick sons from the wolf pack to continue his own lines... hence keeping his daughters to breed to. There for if using any kind of logic... Father to daughter would be most accepted vs Mother to son. Not the other way around.
However I agree it really shouldn't be done except by the more knowledgable breeders. I personally would be fearful of carrying down a bad characteristic or gene.
Tina :-) |