Reference: The Seeing Eye
More dog facts.
Prairie dogs, those little pups popping in and out of holes on vacant lots and rural rangeland, are talking up a storm. They have different "words" for tall human in yellow shirt, short human in green shirt, coyote, deer, red-tailed hawk and many other creatures.
The German Shepherd Dog was created by German cavalry officer Captain Max von Stephanitz. In 1899 he registered a dog named Horand von Grafrath as the first official German Shepherd.
Labrador Retrievers are the breed used most often as guide dogs for people who are blind or visually impaired. Guide dog schools love them for their intelligence, steady temperament, and eagerness to work, and Lab and Golden Retriever crosses are also common.