I get the impression they outsourced the existing supplier from the US to a China supplier.
BTW, I contacted Trader Joe's and asked if their dog food was affected by the recall and they told me no.
There is a brief, vague story in the Bangkok Times seeming to indicate that the source was Singapore. If anything like this happened to my beloved dog I would be very angry. She eats Yorkie-specific food from Royal Canin. What I don't understand is why they manufactured and shipped huge amounts of this food before the testing was completed.