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.
Caviar
China has emerged as the leading producer, accounting for 60% of the world production in caviar. The largest caviar company in the world is the Chinese brand Kaluga Queen, which cultivates sturgeon at Qiandao Lake in Zhejiang.