The Yorkshire Terrier Also see Health and Can Yorkies chew Bones?
How the Yorkie developed is not truly known but it may be from breeds such as the Waterside, Skye, Maltese, Paisley, Clydesdale, Welsh and the Old English Black and Tan terriers. In 1870 they were named "Yorkshire Terrier" - and have become more popular ever since. (Wiki)
A toy dog?
Yorkies are adventurous and brave, unaware of limitations due to their size - or rather lack of size. There exist two views of the Yorkie: first that they are, real dogs and active little terriers, second that they are fragile little toy dogs bred for pampering. The view the owner has, will often affect the way their particular Yorkie turns out, but yes, at most kennels they are classified as a toy breed.
Popular Characteristics of the Yorkie
For many people the most outstanding feature of the Yorkie is their beautiful silky coat. The Yorkshire Terrier is a true “coat breed,” his silky hair is unique and the blue coloration a main feature. They start out black and tan but soon develop steely blue coat. A wonderful advantage is that the coat hardly sheds, they are hypoallergenic, so if you or some in your family suffer from dog related allergies then a Yorkie could be a great choice as a family pet. (Wiki)
When properly bred and raised in the family environment the Yorkie has a wonderful nature with children.
A main feature of the little dog is also his size, and so while he may decide to protect the family from a perceived danger, he may make a lot of noise and even try to attack, you need not worry about a lawsuit for mauling.
Many believe that there is no braver dog than the Yorkshire Terrier.
Beware of a Real Danger
Choosing a trusted breeder is very important. It is not only important to ensure you get a pure bred dog, but you can get something worse than a mix-breed. You may find the puppy to be inbred, another term often used is line breeding, this can cause terrible problems with regard to health and temperament of the dog. It can also cause a lot of upset for the family when these problems appear and then euthanasia...
Care must be taken when making the big decision to adopt any dog.
Yorkshire Terriers are unfortunately often inbred, often called type setting, while this may help to consistently produce smaller dogs (eg. "teacups"), or dogs with certain characteristics, there are often serious weaknesses passed on.
You may even decide to check the ancestry of both parents, especially if the parents are young because they may still develop genetic disorders that only appear later in life.(Wiki)