Shake Shack appears to throw shade at Chick-fil-A in new promotion [Video]

Shake Shack appeared to throw some shade towards Chick-fil-A when announcing a free chicken sandwich only-Sunday promotion during the month of April.

“Here at Shake Shack, we pride ourselves on our Chicken Shack which is available 7 days a week,” the fast food restaurant chain wrote in a press release, appearing to point at Chick-fil-A’s closed on Sunday policy.

The burger joint pointed to their antibiotic-free chicken — apparently highlighting Chick-fil-A’s recent announcement that they are shifting from antibiotic-free chicken starting this spring.

“With crispy, white-meat chicken breast over lettuce, pickles, and buttermilk herb mayo on a toasted potato bun, this sandwich outshines its competition. And what makes our Chicken Shack even better, is that it’s made with antibiotic-free chicken, something not everyone can say these days…,” Shake Shack quipped.

CHICK-FIL-A SET TO SWITCH FROM ANTIBIOTIC-FREE CHICKEN

The New York-based chain touted its antibiotic-free chicken in a poster.

“Eat More Antibiotic-Free Chicken,” Shake Shack announced.

Chick-fil-A said …