The force-feeding process, called gavage, causes the animals liver to expand up to 10 times its size.

CNN: Foie gras causes uproar

What do they think when they see that through the bus windows on their way to the next gavage of geese?

FORBES: How foie gras was my valley

At Hudson Valley, ducks are raised to 12 weeks before they begin the gavage process in pens 4-feet by 6-feet with 11 ducks in each enclosure, according to Marcus Henley, the farm's operations manager.

CNN: Foie gras causes uproar