One of Chick-fil-healthiest A's menu items—and a popular kid's meal—had an undisclosed allergy.
Due a supplier error, the chain's grilled chicken nuggets include a dairy allergen.
A warning on Chick-fil-website A's says the allergen got into the recipe for grilled fillets and nuggets and that the firm is taking quick action.
"We're working with the provider to guarantee this doesn't happen again," the warning says.
"We take the confidence our guests invest in us seriously and apologise for this issue. Our goal is to provide affected guests these things ASAP."
Undeclared dairy allergen in food is innocuous for most, but individuals sensitive to dairy might develop rashes, upset stomach, vomiting, bloody stools, and possibly anaphylactic shock.
Chick-fil-A updated the ingredient list for impacted menu items on its mobile app and website and issued signs to all locations to alert visitors.
While it wants to change its grilled chicken recipe, it will continue selling cutlets and nuggets until they run out.
Not just the poultry chain has a food safety concern. Wendy's is fighting an E. coli epidemic in four Midwestern states, presumably from romaine lettuce.
More than 100 customers have become sick after dining at the chain's Michigan, Ohio, Pennsylvania, and Indiana outlets, and dozens have been hospitalised.