训练是严格的-它必须，而不是所有的仔犬做出品位。
The training is rigorous - it has to be - and not all the young dogs make the grade.
本文介绍了动物标记技术在仔犬警用行为研究中的应用。
This paper introduced the application of marker technique for puppy to police action.
回引导犬，仔犬学习必要的技能，引导盲人或局部失明的人。
Back at guide dogs, the young dogs learn the skills needed to guide a blind or partially-sighted person.
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