Board Thread:Wikia Questions and Answers/@comment-112.203.230.158-20131123133908/@comment-3474542-20131130180558

Note that you cannot clone all animals. Only animals that can be gained from the Baby Playpen, Mystery Eggs, Mystery Babies or Aviary Eggs can be cloned. Not all Foals/Calves/Babies can be placed in the Nursery Barn, which transforms certain foals & calves into adults (the adult version is not always the same version as the baby animal).