http://www.cnn.com/2007/US/03/23/pet....ap/index.html
http://www.foxnews.com/story/0,2933,260862,00.html
One of my local area papers seemed to point "the finger" at farmers, in China, using the aminopterin as a rat control around their crops/supplies.
Could it have gotten mixed in there in some sort of accident or migration? Humm??????