I have a Charolais/Bramer cross that has been breed to a full blood black angus bull. I'm not exactly sure but I think March of this year is supposed to be the due date. Not sure of exact day in March. What bothers me now is that for a week or 10 days she looks like she may have had it already. Her vulva is extremely large. l haven't seen a calf and she hasn't miss a feeding. I am going to try to post picture. Opinions please .