I couldn’t find the answer to this question anywhere, so I decided to post. Sorry if it seems silly. 
I’m interested in leasing a broodmare that is already in foal. If I lease her, do I get the foal, or does the person who bred her get the foal? If I do lease her and breed her again after she foals, would I get that subsequent foal after she returns to her owner?
You are not allowed to lease out mares until they have alrady foaled. Howver, that code seems to be broken at the moment, so I’ll fix it when I get a chance.
Okay. Thanks. 
Now that the situation has changed a bit and the bug is noted… if I lease a mare for a breeding and the lease ends before she foals, where does the foal go?
The foal stays with whomever bred it. The only times foals move is when they themselves are sold or if the mare is sold while pregnant.
Awesome. Thank you muchly.