In short - it's a flag if you can't go to the house. There are sometimes circumstances that would prevent it puppies sick, etc. BUT I would personally treat it as a flag.
GUIDE TO FINDING A RESPONSIBLE BREEDER:
http://www.yorkietalk.com/forums/bre...e-breeder.html
LONG READ BUT WORTH IT'S WEIGHT IN GOLD
here is another GREAT Link to read -
http://www.yorkietalk.com/forums/general-yorkshire-terrier-discussion/6016-yorkshire-terrier-yorkie-frequently-asked-questions-faq.html