The world's biggest hamburger chain is set to expand its test of chicken wings to Chicago this week, after a successful run in Atlanta last year. Fast-food chains typically test items in select markets before taking them national. But for McDonald's, which has 14,000 U.S. locations, adding chicken wings to the permanent lineup could be tricky.
Prices for chicken wings have been climbing because of increasing demand. So McDonald's could offer the dish on a limited-time offer in the months ahead. The chain has tried to ramp up such special offers as a way to give customers more variety.