You have to be part of the group in order to make a breeding ^^.
Option 1 : You choose two horses (two of mine or only one of mine), you draw 2 breedings pictures, send the PM to the group, design both foals and choose your one, the remain foal will be mine.
If you have twins in the process, you can keep it.
Option 2 :You buy a slot, you do the breeding pictures and the foal design.
Price :Hybrid - Different prices
Or a trade of slots (a common slot for a common slot and caetera)