Update to the story first blogged on Monday.
Toxin in pet food recall identified
By Angela Moore, MarketWatch
Last Update: 3:39 PM ET Mar 23, 2007
NEW YORK (MarketWatch) -- The toxin in the pet food that sickened dogs and cats and sparked a massive nationwide recall was identified as aminopterin, the New York State Department of Agriculture & Markets said in a statement on Friday[...]A report by the Associated Press identified the chemical as rat poison.