sheepdog

例句：

1. 1. The shepherd dog was a loyal companion to the herdsman.
   牧羊犬是牧羊人忠诚的伙伴。
2. 2. The sheepdogs were trained to herd the sheep into the pen.
   训练有素的牧羊犬被训练来驱赶羊群进入围栏。
3. 3. The shepherd dog led the way as they made their way back to the farmhouse.
   牧羊犬领路，他们一路返回农舍。