
This question comes up alot, over how many days was she mated as her due date will range from 63 days from first and final tie, that can be quite a time span if you mated her every 48hrs x 3.
How is she in herself?
Is she having an abnormally big or small litter, both can cause primary inertia because the uterus is over stretched in the former and there are not enough hormones triggered by tne pups to start labour in the latter.
Hopefully she has already had her pups or showing signs of getting there.