McDonald's Snack Wrap demand causes lettuce shortage at some of its restaurants

The debut of McDonald's snack wrap earlier this month triggered so much unexpected demand that it temporarily depleted its lettuce supplies.  Less than a week after the Snack Wrap, fried chicken strips rolled in a tortilla, returned to menus, McDonald's sent notices to U.S. franchisees to hold off on adding shredded lettuce to its McChicken sandwiches in order to conserve supplies, according to a company memo seen by The Wall Street Journal.The directive, sent to franchisees last week, aimed to help locatio ...