What is the best animal on Farmville?

Normal Cows - Milk

Chickens - Eggs

Sheep - Wool

Pigs - Truffles

Ducks - Down Feathers

Rabbits - Angora Wool

Horses - Horsehair

Black Sheep - Black Wool

Brown Cows - Chocolate Milk

Pink Cows - Strawberry Milk

Ugly Duckling - Nothing, but can be converted into a swan

Swan - Swan Feathers

Baby Elephants - Circus Peanuts

Turtles - Turtle Eggs

Black Cats - Yarn