Adog'smindisonlyequaltothatofatwo-year-oldbaby. 36 So...
問題詳情：Adog'smindisonlyequaltothatofatwo-year-oldbaby. 36 So,theyareprobablythefirsttonoticeanychangeinthebehavioroftheirmasters.Let'sdosomedeep-diggingtounderstandtheamazingabilityofadog.The...