IIRC China imports chicken feet from places like Australia at a premium, which I think started with lack of supply due to a bird flu. This required the foreign

IIRC China imports chicken feet from places like Australia at a premium, which I think started with lack of supply due to a bird flu. This required the foreign chicken farmers to dramatically improve the conditions of the chickens so that their feet were in good enough condition to sell. All the chicken gets used, even if just turned into stock powder or fertilizer or chicken feed. I imagine the same goes for all the pig heads.