According to www.dogbreedinfo.com, the breed is only 100 years old or so, but its origins are not entirely certain - probably because the working men of north England, who developed the Yorkshire Terrier for catching the terrible rats that infested the mine shafts and as a hunting dog that could penetrate into badger and fox burrows, avoided divulging the secret of their success to those who might have cashed in on a lucrative side line. However, it seems likely that Scotsmen seeking work in the woolen mills of Yorkshire brought with them various types of terrier, including the Skye and the now extinct Clydesdale. These were then crossed with local types, such as the long- haired Leeds Terrier. The Maltese, Black & Tan Manchester, and Dandie Dinmont Terriers may also have contributed blood lines. At first, the Yorkie was a much bigger animal than the one we see today, but by selectively breeding the smallest individuals, the dog was gradually miniaturized over the years. They were made into a fashion dog. Women carried these little dogs in their bags and under their arms. The first Yorkshire, with the characteristics demanded by its standard today, appeared in a dog show in 1870. The Yorkshire Terrier seems oblivious of its small size. It is ever eager for adventure and trouble. This little dog is highly energetic, brave, loyal and clever. Affectionate with its master, but sometimes suspicious of strangers. It can be aggressive to strange dogs and small animals. In other words, it has true Terrier heritage. They do best with older, considerate children. Yorkies are easy to train, although they can sometimes be stubborn. The breed is demanding and dependant and needs a lot of human attention. The Yorkie is an excellent watchdog, defending its territory in no uncertain manner. They can get snappish if surprised, frightened or over-teased, but are usually very sweet and loving. They can be difficult to housebreak. These little dogs should not be over-protected, for they may become neurotic. The Yorkie likes to bark, but it can easily be taught not to do so. They have a life expectancy of 12-15 years.