Yorkshire Terriers are a long-haired breed with no undercoat, which means that they do not shed as much as their short haired friends. Rather, their hair is like human hair in that it grows continuously and falls out rarely (only when brushed or broken).(Wikipedia)
Although a toy breed, the Yorkie still retains much of its terrier ancestry in terms of personality. Individual dogs will differ, but they are generally intelligent, independent and courageous. Yorkshire Terriers are quick to determine where they fit in a household's "pack." Their behavior towards outsiders will vary - they often will be inclined to bark at strangers, but some Yorkies are outgoing and friendly towards new people while others are withdrawn and aloof.(Wikipedia)