U.S. egg prices increased again last month to reach a new record-high of $6.23 despite a drop in wholesale prices and no egg farms having bird flu outbreaks.

Industry experts were expecting the Consumer Price Index to reflect a drop in retail egg prices because wholesale egg prices dropped significantly in March.

Egg prices have reached record highs as bird flu outbreaks have hit poultry farms and forced producers to cull tens of millions of hens.