Sheplers, a western-wear retailer, on Friday reported it had been victimized by a data breach in which customer credit card information was exposed to hackers. The company said the breach involved credit cards used at its stores between June 11 and Sept. 4. Sheplers said it doesn't believe the incident affected its online store. The company said it's working with law enforcement investigators, but "at the present time, we believe it's safe to use payment cards at Sheplers." According to the company, the customer information at risk includes names, account numbers for credit and debit cards, and card expiration dates.