Wondering if others are having this problem. I synchronize my cows so they hopefully calf in groups. my first group started calving almost 2 weeks early this year which isn't unusual. also not unusual for later cows in first group to be later that early cows in second group (I sync on 3 week interval so cows that recycle come in with next group.) Caught my first born nursing on a first calf heifer that did not calf yet. Vet said her calf will need to be bottle fed colostrum after it is born since the heifer will likely not have good colostrum now. Had similar thing happen two years ago when I am sure that calf sucked shortly after birth but went down hill after a couple of days. Blood test showed calf did not get enough colostrum. Cows are not crowded but are in a barnyard with a good size barn and shed for protection from Iowa winter weather. I now have cows/heifer that did not calf yet separated from pairs. Is this a similar problem that others have? Any other solutions?