
Hi! Congratulations to you and proud mum :-p
Yes, this is normal. The uterus is contracting still, to regain its' normal size. This makes the bitch restless and wanting to dig. Odviously it hurts. Your girl is very good, doing it outside of the whelpingbox

A warm towel on her tummy when she is laying down with her pups, may help a little.
Best wishes,
Karen