It's also very important to find a reputable breeder because of genetic health issues in both Yorkies and Maltese. Maltese have remained #20 in popularity and Yorkies have been #1 or #2. Popularity takes its toll on a breed and sadly, Yorkies are no exception. They have been exploited by breeders who sell them for profit only and don't "waste" $$ with expensive health testing.
The sad result is that today Yorkies are 36 times more likely to be born with a congenital liver shunt
than all other breeds combined.
According the the YTCA survey, they are even more likely to be born with Legg-Perthes.
Portosystemic Shunts FAQ Health Survey 2007
Luxating patellas (slipped kneecaps) are a problem in both breeds. The Orthopedic Foundation of America ranks Yorkies #3 and Maltese #29 in number of cases.
OFA: Patellar Luxation Statistics
All these conditions require thousands of dollars for surgery by board certified specialists at either a vet school or in private practice.
Be wary of breeders who have puppies "ready to go". Reputable breeders do extensive health and genetic screening prior to breeding to make sure they only produce healthy puppies. They often have wait lists for their puppies. Their puppies are worth waiting for.
It's very tempting to look at puppies before researching a breeder and letting your heart take over your decision. Who can resist a cute puppy? The best way to do it is to find your breeder first,
then look at puppies. An emotional decision can end up being very expensive and heartbreaking.