An egg shortage caused by a bird flu outbreak has forced McDonald's locations in Australia to reduce breakfast hours by 90 minutes. 

In Australia, McDonald's serves breakfast until noon but breakfast service will now stop at 10:30am.

"Like many retailers, we are carefully managing supply of eggs due to the current industry challenges," said McDonald's Australia in a statement on Thursday. "We’re continuing to work closely with our network of Aussie farmers, producers, and suppliers, as the industry comes together to manage this challenge."