Just an couple of ideas:
-Barn
You can put Cows, Bulls, and Sheep inside. Each animal takes up a slot. The UI shows the slots, and whats in them. You can rearrange them, and if a male and female are next to each other, you can choose to allow breeding if you want. You can milk, slaughter, and shear will they are in the stalls, and each stall has its own food trough built in.
-Noble Steeds...and Asses
Donkeys and Horses. Donkeys pull a Wagon, and Horses can pull a wagon faster, or you can ride them! Saddles, Bags, Reins, the works.
-Stable
A Stable for your horses and asses. Same as a barn, but feed them straw instead. or whatever it is they eat.
So, tell me what you think.