Rat poison found in recalled pet food

A source close to the investigation tells ABC News that the rodenticide (aminopterin), which the source says is illegal to use in the United States, was on wheat that was imported from China and used by Menu Foods in nearly 100 brands of dog and cat food.
A news conference is scheduled for this afternoon by experts in Albany, N.Y., where scientists at the state's food laboratory made the discovery a week after a massive recall of 60 million cans and pouches was issued.

What investigators can't say so far is whether this is the only contaminant, if it is in all of the recalled food, or if it's in enough quantity in to sicken more animals.

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