Originally Posted by Left Hand Percherons
Restrain the mare with hobbles or stocks or even easier, put her in the stall and position her where her udder is even with the door, open the door (only works with sliders) just a foot to allow the foal access to the mare. Mare can't kick or bite at him. Mildly sedate the mare or feed her grain while the colt is there to distract her. If the mare is dripping milk, she will want the relief from the foal nursing. I would be hand milking the mare a few times a day to keep her in production and use her milk to feed the foal.
I think my parents have been using a combination of enriched formula and natural milk from mom. But restraining her is a good idea, not exactly ideal, but at this point, we're kinda desperate to get things as on track for the baby as possible.