This page (I don't know how long it will work) talks about the rat poison you mention, elflinn.
Aminopterin, a derivative of folic acid, can cause cancer and birth defects in humans and can cause kidney damage in dogs and cats, the statement said. Aminopterin is not permitted for use in the United States.
A report by the Associated Press identified the chemical as rat poison.
Obviously, this rat poison is not only very dangerous to pets, but also to humans.
The manufacturer, Streetsville, Ontario-based Menu Foods Inc. (...) had said it believed the culprit was wheat gluten that it had been receiving through a new supplier.
malu
