Bird flu is causing egg prices to soar, costing restaurants more, especially those that focus on brunch. Some restaurant owners say they are already raising prices.

Breakfast sandwiches are the most popular order during morning visits, and 70% of the breakfast sandwiches on U.S. menus include eggs. It’s a chicken-and-egg problem: Restaurants are struggling ...

Ed Powers, director of operations for the restaurant chain Broken Yolk Cafe, said that for a breakfast- and brunch-centric business like his, the egg situation is impossible to ignore. Eggs make ...