According to the Hill's Prescription Diet website feline m/d food has been recalled.  It says "Hill's is taking this precautionary action because during a two-month period in early 2007, wheat gluten for this product was provided by a company that also supplied wheat gluten to Menu Foods. U.S. Food and Drug Administration tests of wheat gluten samples from this period show the presence of a small amount of melamine."

The melamine finding came a week after scientists at the New York State Food Laboratory identified a cancer drug and rat poison called aminopterin as the likely culprit in the pet food. But the FDA said it could not confirm that finding, nor have researchers at the University of Medicine and Dentistry of New Jersey when they looked at tissue samples taken from dead cats. And experts at the University of Guelph detected aminopterin in some samples of the recalled pet food, but only in the parts per billion or trillion range.

"Biologically, that means nothing. It wouldn't do anything," said Grant Maxie, a veterinary pathologist at the Canadian university. "This is a puzzle."

Meanwhile, Hill's Pet Nutrition recalled its Prescription Diet m/d Feline dry cat food. The food included wheat gluten from the same supplier that Menu Foods used. The recall didn't involve any other Prescription Diet or Science Diet products, said the company, a division of Colgate-Palmolive Co.  kirotv.com