Dog owners, take heed. The Pedigree Brand unit of privately held Mars Inc. is voluntary recalling one specific lot of its dry dog food product this week because of potential contamination by metal fragments. The U.S. Food and Drug Administration, or FDA, reported 22 bags of Pedigree Adult Complete Nutrition dry dog food in the 15-pound size are at risk of containing “small metal fragments.”

Although the fragments are not embedded in the food, they could still present a safety hazard for pets should they be consumed, the company said in a statement. “We take our responsibility to pets and their owners seriously,” the firm said. “We sincerely apologize for this situation.”

The affected bags were sold at 12 retail outlets of the Dollar General Corp. (NYSE:DG) in Arkansas, Louisiana, Mississippi and Tennessee Aug. 18-25, the FDA said. Each recalled item has a Best Before date of Aug. 5, 2015, and the lot code number 432C1KKM03.

The FDA noted it had not received any reports of injury or illness related to the affected bags.

No other Pedigree dog food products are affected by the recall. The FDA is advising consumers to either discard or return the potentially contaminated products to retailers for a full refund or exchange.

Mars Petcare U.S. said consumers can get more information about the recall by calling 1-800-305-5206 between 8 a.m. and 7 p.m. CST.