Did your friend already pay 50% towards all this? Or did mare owner?
If friend did, she needs ALL her money back ASAP.
Was there a written contract? What was the cost, approximately of this whole foal going to be?
I would be thinking mare owner pulled fast one and had no intention from the get go of letting foal go, or as another said, decided foal was a good one.
Shoddy business dealings sounds like to me.
Could also be price of these foals has gone up and someone else offered more money?
But the one getting the foal, should have been able to see foal the first week, and her vet should have been able to see vet report.
Horses make me a better person.