Board Thread:Wikia Questions and Answers/@comment-112.203.230.158-20131123133908/@comment-409884-20131123144504

You have to place them into the proper Animal pens for the animal types. Then when the you harvest the building you have a chance of gaining ta Foal/Calf/baby of the animals that are in the building.

You place the baby version into the Baby Nusery and it will grow up into the Adult (clone) version of the original.