In fact, scientists estimate that dogs can identify smells as much as 10,000 times better than you can.Some of the difference lies in their supersensitive snouts.

• 在另一个病例中，一只名叫“帕克”的拉布拉多猎犬，也是不停地用鼻子抚弄它66岁的主人，隔着主人的裤子不停地闻他腿上的一处伤口。