JBS-USA has banned ractopamine from hog rations so it can take full advantage of export opportunities.
China and Viet Nam are likely candidates as both are reeling from heavy hog losses to African Swine Fever.
China, Europe and a number of other countries will not buy pork from hogs whose rations have been laced with ractompamine, an additive that improves feed efficiency and increases lean meat content.
This summer Canada lost exports to China after a Quebec company shipped pork that contained residues of ractopamine.
Originally China suspended only shipments from that company, but later all Canadian pork after the discovery of about 175 falsified export certificates.
Canada has never said where those certificates originated or whether the Canadian Food Inspection Agency or somebody else was responsible.