Welcome to YorkieTalk
Congratulations to you on wanting to do your research before buying a Yorkie. I would suggest that you start by making a list questions that you want answered and use the search function and start reading
. Once you get a good feel for what Yorkies are all about and the concerns that most of us have, you can start making a list of specific questions to ask.
I hope this doesn't sound mean - I just know that there is a plethora of information here at YT about almost any subject regarding yorkies that you can think of -- and many that you would never dream of asking. I am afraid that if you just read the replies to your thread, then you will be missing a wealth of information. Again, congratulations on your wise decision to educate yourself, and happy reading!