I have 3 new calves on the ground, all by the same low birth EPD sire. 2 baldies and 1 Angus. The Herefords were both heifers and delivered early, 8 & 13 days respectively. The Angus cow was 2 days early. Isn't this unusual? I used the Angus table to figure due dates and since all were AI'd there is no mistaken conception dates. Should I have used a different table to figure when the Herefords would calf?