Luvdorkyyorkies - I have been pondering over your post since you wrote it thinking what also might be of use in your "info packet" to new puppy parent (s).
You have already been given such great advise which is awesome.!
I was thinking too, maybe you could include on your paperwork the web site for Yorkie Talk. I understand that a breeder as yourself cannot be ALWAYS 24/7 on the phone or internet giving advise or answering questions to new puppy parent (s).
Yorkie Talk is always such an inspiration and covers soooo many questions and or concerns that new puppy parent (s) might come across. Along with the stories that Yorkie Talk members give, pictures, etc., it might be a comforting tool at hand. I sure wish I knew about this site when I first received my first Yorkie...
Just a thought...