Poultry
In some countries, geese and ducks are force-fed to produce livers with an exceptionally high fat content for the production of "foie gras". Over 75% of world production of this product occurs in France, with lesser industries in Hungary and Bulgaria and a growing production in China. "Foie gras" is considered a luxury in many parts of the world, but the process of feeding the birds in this way is banned in many countries on animal welfare grounds.
Foie gras
The polarising and controversial nature of foie gras production was identified in a paper that juxtaposed the views of "foie gras production as the apotheosis of murderous meat production, and those who consider it to be a co-production between humans and animals".