Shake Shack Throws Shade at Chick-fil-A with Free Chicken Sandwich Sundays

Shake Shack announced free chicken sandwich promotion on Sundays in April, appearing to throw shade at Chick-fil-A's closed-on-Sunday policy
Promotion touted Shake Shack's antibiotic-free chicken, contrasting Chick-fil-A's recent switch away from antibiotic-free chicken
Shake Shack quipped its chicken sandwich "outshines competition" in press release
Customers can get free Chicken Shack sandwich on Sundays in April with $10 minimum order and promo code
Promotion comes after Chick-fil-A announced moving away from antibiotic-free chicken due to supply chain issues