how long can a mare be overdue
Sandy (64.158.241.214). Megan, my mare is 3 weeks overdue today. There is no reason to think the foal is dead because they are overdue. A mare can still safely have a healthy foal up to 400 days.I had a mare go to 370 days last year and she delivered a healthy foal without complications.You should still be able to see the foal moving around quite a bit in your mare. mare can still safely have a healthy foal up to 400 days. I had a mare go to 370 days last year and she delivered a healthy foal without complications. You should still be able to see the foal moving around quite a bit in your mare.