From the Hartz website:

The Hartz Mountain Corporation is voluntarily recalling one specific lot of Hartz Vitamin Care for Cats due to concerns that one or more bottles within the lot may have been potentially contaminated with Salmonella.

The product involved is 3600 bottles of Hartz Vitamin Care for Cats, lot code SZ-16371, UPC number 32700-97701, which was manufactured by a third party manufacturer, UFAC (USA), Inc., in Baconton, Georgia.

More at http://hartzadvancedcare.com/About%20Hartz/prCatVitRecall.asp