A question regarding horse breeding in Farmville?

Okay, so I was wondering, I know how to post many foals in Farmville, but I want to know how people get the foal they want to post exactly. Do you place the rare horse with the stallion in the horse stable? Then place a seeder horse into it to make it ready? Then do I repeat this process again? For example, I have a Snow Stallion. I want to post a Monogolian Foal, and I do have the horse. So do I place the Mongolian Horse with the Stallion. Then say I place a regular horse in with it to make it ready? Please help me, forums around don't tell me nothing. Thank you for your listening and answer, I appreciate it!