Which Dog? Which Book? A Shaggy Dog Tale

Why does a library need reference sources concerning the various breeds of dogs? What kinds of questions are likely to be encountered which could be answered by books of this type? Some of the questions I have been asked include: “What kind of a dog is a Puli?” “Do you have a picture of an Irish Setter I can copy?” “What breed of dog is good with children and can live in an apartment?” “Do Tibetan Terriers really come from Tibet?” “I saw this dog but I don't know what it is. Can you help me identify it?”