The chicken delivery problem is so severe that the company cannot say when operations will be back to normal. But it said it was working “flat out” to resolve the crisis. Signs on many of the closed stores said: “Sorry, we’re closed. We deliver our chickens fresh into our restaurants, but we’ve had a few hiccups with the delivery today. We wouldn’t want to be open without offering our full menu, but we’ll be back at the fryers as soon as we can.”