However, it has been proven unhealthy to breed for more white, especially an all white head, as it results in more cases of deafness and blindness.

• 相反的是,事实已经证明了,繁育有过多白色的古牧,对古牧是不健康的!尤其是全白头!繁殖全白头古牧,容易引起失明和耳聋。