From the ArcaMax Publishing, Cats & Dogs Newsletter:
http://www.arcamax.com/news/catsanddogs/s-177124-829063
The long-haired "Yorkie" is known for its playful demeanor and
distinctive blue and tan coat. Though a toy breed, Yorkies still
retain much of their terrier ancestry in terms of personality and are
generally intelligent, independent and gutsy with males, in
particular, being very territorial.
Some Yorkies are unaware of their small size and may even challenge
larger, tougher dogs. Because of their pugnaciousness and tendency to
pounce and "hunt" they can nip and are not suitable for homes with
very young children. Yorkies typically get along well with other dogs
and love to play together with them.