Just read a study put out by the U of Mn. that for every 10 minutes you wait to assist a cow having difficulty giving birth, you add on 2 days to her postpartum interval. Now I've read on here how some almost never assist their cows, so it would seem some are extending their calving season by weeks. I've always assisted every cow I see calving, even if it's a slight tug, just because I think it's easier on her. Wrong?