
I have friends who have a golden with one - she's a well bred dog from a reputable breeder. Their other dogs are OK though. Other friends with goldens don't have a problem, that I'm aware of. But don't know how common, I'm afraid. The KC breed records supplement lists dogs which have been eye tested over that quarter, and whether affected or unaffected by certain eye conditions. Most of the Goldens tested seem to be unaffected. :)