Yes, even Ann Seranne (one of the Mayfair ladies) stated to wait. Yorkies can become too stressed out when tails are docked too soon. I know most vets say 3-4 days old, but they are not experts with yorkies. Ann Seranne says day 6 is the best!!
We just had our babies done the evening on day 5, since I had a prior engagement already scheduled on their day #6. They did fine.
Congratulations Ricki - your babies look beautiful!
T.