简介：He has shared our lives for 20,000 years. Along the way, he has helped us find food, kept our livestock, protected us from our enemies, guided us in extreme conditions, and saved us from peril. Now, he comforts us, relieving loneliness and helping us cope with old age. How did dogs come about?小小影视为您提供《人类的第一个朋友》免费在线观看，及播出时间。喜欢的话，不要忘记分享给好友哦
