Is it just me, or does this sound like a bad idea? Percheron Draft Mare Reduced
Pregnant mare, current owner gets foal if it's colored, new owner gets foal if it's solid. Just seems like People's Court waiting to happen, if mare gets hurt while pregnant, problem occurs while foaling, foal doesn't make it, mare doesn't make it, it's a colored foal and the prior and new owner argue about how long it stays with mom and who has to pay for what... Just rife with potential problems, though a really REALLY good contract would help.
But yeah, just keep the mare until she foals, and decide who and what to sell, and for how much, THEN.