Chicken

Alpha
1.0.14: Added Chickens

1.0.17: Chickens are now immune to fall damage, and fall slower than other mobs.

Chickens no longer drop leather when killed by fall damage.

Beta
1.0: Chickens can be spawned by throwing eggs.

1.8: Chickens now drop raw chicken. Before this, chickens dropped only feathers upon death.

Chickens will run away when attacked.