My last mare is 12 days away from 300 days (based on first day covered). In the last three days she is bagging up quite quickly. She is a 28" refined mare so bag does not get huge. How many days before 300 days can the foal be able to live without medical intervention. I know some breeders jave had mares foal before 300 and foal was healthy. She has had one previous foal and she foaled on 320 days. Here is her bag production in the last three days. First is Thurs, than Fri, and last is today. She is penned with our five other mares that have foaled and is fed alfalfa am and pm. The remaining time she is grazing on a pasture with no fescue.