Welcome to YT! You've certainly come to the right place to start researching these little ones!
What information exactly were you looking for?
I would suggest you start by researching the breed--the standard, so you can better evaluate if potential pups are well bred. Also, the health issues that are notorious with breeds--which tests breeders should have done on pups and what to look for.
Also, research some of the red flags commonly associated with shady Yorkie breeders so that you know what to avoid:
* breeding mutliple breeds and/or mixed breeds
* questionable registration
* dogs that stray from the standard for the breed
* breeders that don't have s/n agreements and who have bad or no sales agreements
* people claiming their dogs are "teacups" or "micros" or "tinies"
* having multiple litters in short amounts of time
* breeding extemely small famales (under 5 lbs)
Good luck with your search and research.
