Furthermore, around eight to ten weeks the puppy goes through a fear period where it is extremely susceptible to physical and psychological trauma, the effects of which may be permanent and irreversible.

• 此外，大约在八到十周的时候幼犬会经受着一个容易让他们感到忧虑的时期，这时候他们的身体和心灵都很敏感，若是受到创伤，其影响可能是永久的，不可改变的。