人们对于基因变得异乎热衷，他们开始混合本土高加索和德国牧羊犬以及大丹犬的血统以期改良犬的品质。
The people became enthusiastic about genetics and tried to improve the breed and they began to mix native caucasians with the german shepherd and great dane .
人们对于基因变得异乎热衷，他们开始混合本土高加索和德国牧羊犬以及大丹犬的血统以期改良犬的品质。
The people became enthusiastic about genetics and tried to improve the breed and they began to mix native caucasians with the german shepherd and great dane .
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