Chocolate Cows is where chocolate milk comes from.
Chocolate cows were created when the Council of Doom put a herd of cows in a special room made just for tanning with nothing to eat but cocoa beans. The cows were forced to stay in this room for 3 months. This herd has come to be known as Alpha Prime, or the first herd of chocolate cows.
Cocoa Beans, lots and lots of cocoa beans...
There is only one breed.
The only predators known are Squirrels. Measures have been taken, such as sending all the non-kamikazee squirrels to hell.