
Firstly your post is highly likely to be edited by admin, as we aren't allowed to mention breeds...particularly if due/just had litters as it is against board rules.
Did you have one mating or more? Did you test to see if she was ovulating, as that will determine the due date?
You cant rely on ultra sounds to give you an exact date PLUS mother nature will take its course & your bitch will whelp when she is good & ready...