I'm trying to have restraint ... it seems better to be safe than sorry, at least until we know why these birds died. It could have been something unrelated to the food. Maybe the birds had irritated stomachs from one cause, and the sudden deaths had a different cause. We don't know what information is important here. Maybe there was a monoxide buildup, that got cleared by the time it was tested, because they were opening doors to move the birds. But until we know, if it saves the life of one parrot, it's worth being careful.
I also posted a comment on the Zupreme FaceBook page, in response to their comment. They stated "We do have retained samples of the batch codes and date codes of the food in question and we have again reviewed the analytical testing and are confident that the food is safe to feed." I read this as meaning that they pulled up the test results (from computer or paper) and reviewed them, and all looked OK. So I asked them which it was - did they review the test results, or did they repeat the testing on the retained batches of product. When they answer, I'll post it here.