Denny’s and Waffle House have removed surcharges that the two restaurant chains added to their menus when U.S. egg prices spiked earlier in the year.

Denny’s confirmed that it eliminated its egg surcharge on May 21. Waffle House said on social media that it canceled its surcharge on June 2.

Waffle House instituted a 50-cent per egg surcharge in February at all of its 1,900 U.S. restaurants due to the soaring cost of eggs. Denny’s also put a surcharge in place in February, but it varied by location.

Outbreaks of bird flu in January and February caused the average price of a dozen Grade A eggs to hit a record high of $6.23 per dozen in March, according to the U.S. Bureau of Labor Statistics.

More than 174.8 million wild bird and poultry have been killed due to the virus, which began circulating in January 2022. Any time a bird gets sick, the entire flock is killed to help keep the highly contagious flu from spreading. The mass slaughters can affect egg supplies because massive egg farms may have millions of birds.

Egg prices at grocery stores began falling in April as bird flu cases fell and Easter demand eased. In May, the average retail price dropped further, to $4.55 per dozen. That was the lowest price since December, when eggs averaged $4.15 per dozen.