Dragon Hunters (fan expansion for Carcassonne)

In good times, when the land breeds plenty, tales of dragons are written off as myths. But during the hard times, dragons are blamed for all sorts of ills. Men would often erect huge dragon slaying machines in the countryside in the hopes of being able to brag to their grandchildren about the success in hunting down the winged terror haunting the skies.

This expansion will add:
Tiles with ballistas and catapults and trebuchets.
Black boars, white sheep and brown cows

Very rough rules:
Each player gets one sheep and one cow. If playing with Forests, they get a black boar/pig as well.
Expansions required = P&D.
Tiles are shuffled into the supply.