Nutro Products has announced a voluntary recall of certain varieties of dry cat food because of excessive zinc and inadequate potassium supplementation.

On May 21, the company recalled Nutro Natural Choice Complete Care Dry Cat Foods and Nutro Max Cat Dry Foods with "best if used by" dates between May 12, 2010, and Aug. 22, 2010. According to the company, the recall resulted from a production error by a U.S. supplier of mineral premixes. One mineral premix contained excessive zinc and inadequate potassium. A second premix contained inadequate potassium. Nutro identified the issue during an audit of the supplier's documentation.

Nutro had distributed dry cat food containing the premixes throughout the United States and to Canada, Indonesia, Israel, Japan, Korea, Malaysia, Mexico, New Zealand, Singapore, and Thailand. Now the company is working with distributors and retailers to ensure the products are not on store shelves. Consumers who purchased one of the products can return it to their retailer for a full refund or exchange for another Nutro dry cat food.

At the time of the recall, Nutro had received no complaints relevant to the products. Nevertheless, the company advises cat owners to monitor cats that ate any of the products for signs of problems—such as a reduction in appetite, refusal of food, weight loss, vomiting, or diarrhea. Cat owners should contact their veterinarian if a cat is experiencing health problems or is pregnant. Consumers who have questions about the recall can visit www.nutroproducts.com or call (800) 833-5330 between 8 a.m. and 4:30 p.m. Central Daylight Time.