"Shake Shack Offers Free Sunday Chicken Sandwiches, Takes Aim at Chick-fil-A"

Shake Shack is offering free Chicken Shack sandwiches every Sunday in April with a minimum purchase of $10, seemingly taking a dig at Chick-fil-A, which is famously closed on Sundays. This move comes as Chick-fil-A recently announced a change in its antibiotic-free chicken policy due to supply chain concerns. The promotion has sparked a debate among foodies, with Shake Shack customers able to claim their free sandwich by visiting a local storefront or using the code "CHICKENSUNDAY" on the app.