It is inherited in Newfoundlands, and also found in Golden Retrievers, Rottweilers, Boxers, Bulldogs, German Shepherd Dogs, and Samoyeds.

• 常见于[[纽芬兰犬]]、[[金毛寻回猎犬]]、[[罗威纳犬]]、[[拳师犬]]、[[斗牛犬]]、[[德国牧羊犬]]和[[萨摩耶犬]]。