The production of foie gras involves the controversial force-feeding of birds with more food than they would eat in the wild, and more than they would voluntarily eat domestically. The feed, usually corn boiled with fat, deposits large amounts of fat in the liver, thereby producing the fatty consistency sought by some gastronomes.

Foie gras ; French: [fwa ɡʁɑ], ) is a specialty food product made of the liver of a duck or goose. According to French law, foie gras is defined as the liver of a duck or goose fattened by gavage.