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 en..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? 欢迎在线观看由Paul Bandey等主演的《人类的第一个朋友》，大尺寸影院第一时间为您提供《人类的第一个朋友》免费在线观看，如果您喜欢《人类的第一个朋友》请把地址收藏起来或者分享给您的朋友们！详情
