Green Calf

The Green Calf or Green Baby Calf is the offspring of a Bull and B0V1NE-09. When you collect milk from your Dairy Farm (with 1 Bull and at least 1 B0V1NE-09) there is a chance to collect a Green Baby Calf.

Trivia
Interestingly, the Calf and the Green Calf were the only animals in FarmVille with no shadow, however this has been corrected.