Guide dogs are service dogs that have been specially trained to help the visually impaired safely navigate their environments. The first school for guide dogs was established by the German government after World War I to provide service dogs to blinded veterans. Schools now exist in several European countries and in the US, where the pioneer Seeing Eye, Inc., founded by Dorothy Harrison Eustis in 1929, is one of the best known. What breeds are most frequently trained to be guide dogs? Discuss