Villagers can be assigned the job sheppard in a map or land script but you can't make them in game.
The only disciples you can make in the game are placed next to fixed objects/buildings , with the exception of breeders.
Now here comes a potential problem lonely potential breeder meets sheep ...
God (thats you) joins man and sheep in the same way as he joins man and woman.
The Missionaries in land 1 say that sheeps have many uses .............need I say more.