Two major grocery chains, Trader Joe’s and Costco, have started placing restrictions on how many eggs a customer can buy, as supply slows down due to the ongoing bird flu outbreak.

Trader Joe’s has limited egg purchases to one dozen per customer as bird flu outbreaks lead to nationwide shortages and rising prices.

At the time, Trader Joe’s joked the egg shortage was prompted by chickens being on strike. Now, the retailer is working to restock its shelves by limiting how many cartons its c ...