Italian explorer Columbus, who discovered America for Spain in1492, believed that for fighting Indians one dog was worth fifty soldiers. 义大利探险家哥伦布一四九二年为西班牙发现了美洲。
During the Great War, guide dog training schools were set up in Germany to aid injured soldiers and spread to Britain in the early 1930s with The Guide Dogs for the Blind Association established in 1934. 一战期间,德国设立了专门学校以训练军犬援助伤兵。在20世纪30年代早期,这一做法传到了英国,英政府于1934年设立了导盲犬协会。